path: root/ChangeLog

2023-04-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Attempt to further clarify end-of-sentence detection.

	* doc/groff.texi (Sentences):
	* man/roff.7 (Concepts): Do it.

	Fixes <https://savannah.gnu.org/bugs/?64091>.  Thanks to Ingo
	Schwarze and Dave Kemper for the report.

2023-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Minimally document `tag`, `taga` requests.

	* doc/groff.texi (Postprocessor Access):
	* man/groff.7 (Request short reference): Do it.

	Fixes <https://savannah.gnu.org/bugs/?62695>.

2023-04-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Fix typos.

	* doc/groff.texi (ms basic information):
	* doc/ms.ms (Basic information): Do it.

	Fixes <https://savannah.gnu.org/bugs/?64032>.  Thanks to an
	anonymous reporter.

2023-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Operators in Conditionals):
	* man/groff.7.in (Conditional expressions): Clarify how the
	output comparison operator is recognized.

	Fixes <https://savannah.gnu.org/bugs/?63812>.  Thanks to John
	Gardner for the report.

2023-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	Use a better type for symbol hashes.

	* bootstrap.conf: Add "stdint" module to ensure that the
	`uintptr_t` type is available.
	* src/include/symbol.h: Include <stdint.h> for `uintptr_t`.
	(class symbol):
	(symbol::hash): Change return type from `unsigned long`, which
	causes build failures on 64-bit MinGW, to `uintptr_t`.
	(symbol::hash): Use a C++ type cast, not a C-style one.

	Thanks to Bruno Haible for reporting the build failure in the
	64-bit MinGW environment, and for suggesting a remedy.

2023-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[groff]: Revise a test to be more revealing.

	* src/roff/groff/tests/initialization_is_quiet.sh: Stop using
	"set -e".  Instead use `fail` variable and `wail` function (and
	lowercase names for our internal variables) like many of our
	other tests.  If the "unset" shell built-in fails, skip the
	test (prompted by /usr/xpg4/bin/sh on Solaris).  Attempt every
	groff locale, with and without compatibility mode initially
	enabled, instead of stopping at the first failure.  Report
	standard error and standard output content separately.  Use
	groff's `-a` flag to prepare the standard output, for
	readability.
	* PROBLEMS: Document that this test might be skipped rather than
	failing on Solaris.  (What actually happens depends on which
	shell you run it with, and we advise a variety of approaches.)

	Thanks to Bruno Haible for feedback regarding mysterious
	failures of this test on GNU/Hurd and NetBSD systems.

2023-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* bootstrap.conf (gnulib_modules): Add "stdbool-c99" per
	recommendation from Bruno Haible.

	Fixes build problem on Solaris using Sun compiler.

2023-03-06  Bruno Haible <bruno@clisp.org>

	* Makefile.am (AR): Remove hardcoded value. Let Automake use the
	value from config.status.

	{Fixes build problem on 64-bit AIX.  Problem appears to date
	back to commit 5fec19d453, 2014-08-15. --GBR}

2023-03-06  Bruno Haible <bruno@clisp.org>

	* arch/misc/misc.am (shdeps.sed): Rename target from this...
	($(SH_DEPS_SED_SCRIPT)): ...to this, to work better with make(1)
	on FreeBSD, NetBSD, and AIX.

2023-03-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Discard now-unneeded Autoconf macro and variables.

	* configure.ac: Stop calling `GROFF_POPPLER`.  Stop populating
	the Automake conditional `HAVE_PDFTOOLS`.  Eliminate chatter
	about their availability in the configuration report.
	* m4/groff.m4 (GROFF_POPPLER): Delete.

2023-03-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS_NOTICE): Adapt wording of notice
	to presence and identity of Ghostscript interpreter command.
	Clarify that it is gropdf(1) specifically that traverses the
	Ghostscript search path reported by its "-h" option.

	Continues <https://savannah.gnu.org/bugs/?63808>.  Thanks to
	Deri James for the ongoing discussion.

2023-02-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[devpdf]: Revise tests.

	* font/devpdf/tests/check-default-foundry.sh.in: Test only the
	base 14 fonts of the PDF standard unconditionally.  Test the
	remainder from the set of 35 commonly distributed only if a
	Ghostscript interpreter was detected at configuration time,
	because the latter fonts _must_ be embedded in PDF documents.
	If they're not present, skip the test rather than failing it.
	* font/devpdf/tests/check-urw-foundry.sh.in: Skip test if no URW
	fonts detected at configuration time, rather than failing it.
	* m4/groff.m4 (GROFF_GROPDF_PROGRAM_NOTICE)
	(GROFF_URW_FONTS_NOTICE): Drop warnings of expected test
	failures.  The tests no longer fail in the anticipated
	circumstances.

2023-02-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[devpdf]: Generate tests from template files, so we can populate
	the test scripts with information determined at configuration.
	The default foundry test depends on $GHOSTSCRIPT, and the URW
	foundry test on $urwfontsdir.

	* font/devpdf/tests/check-default-foundry.sh:
	* font/devpdf/tests/check-urw-foundry.sh: Rename these...
	* font/devpdf/tests/check-default-foundry.sh.in:
	* font/devpdf/tests/check-urw-foundry.sh.in: ...to these.

	* font/devpdf/devpdf.am (font_devpdf_default_test)
	(font_devpdf_urw_test): New variables store names of generated
	test scripts.
	(font/devpdf/tests/check-default-foundry.sh):
	(font/devpdf/tests/check-urw-foundry.sh): New targets produce
	test scripts from corresponding .in files.

2023-02-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[devpdf]: Trivially refactor.  Rename sed-substitutum [Lat.]
	from "@GROFF_GHOSTSCRIPT_INTERPRETERS@" to "@GHOSTSCRIPT@" for
	clarity and brevity; this is a scalar value containing the
	Autoconf-determined name of the Ghostscript interpreter.  It is
	not the same as the replacement that occurs in contrib/pdfmark.

	* font/devpdf/devpdf.am:
	* font/devpdf/util/BuildFoundries.pl: Do it.

2023-02-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Stop scraping output of Ghostscript executable with
	"-h" option to attempt to find URW fonts.  Fonts that ship with
	Ghostscript are regarded as the "default" foundry, not the URW
	foundry (though they often ultimately originate with URW fonts).
	They are often missing Adobe Font Metric (AFM) files, so it is
	impossible for groff to generate font description files for them
	at build time.

	* m4/groff.m4 (GROFF_URW_FONTS_CHECK): Drop `AC_REQUIRE` on
	`GROFF_AWK_PATH`.  Drop awk-based scraping of Ghostscript "-h"
	output.  Annotate need for sync between this list of
	characteristic font file names and the one in BuildFoundries.

	Thanks to Deri James for the ongoing discussions.

2023-02-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Drop now-redundant explicit
	`GROFF_URW_FONTS_CHECK`.  `GROFF_GROPDF_DEPENDENCIES_CHECK`
	`AC_REQUIRE`s it as of commit ec001d2a23, 18 February.

2023-02-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS_CHECK): When looking for a
	characteristic URW font by its file name, also check for
	"URWGothic-Book" with no file extension.  Avoids false negatives
	in URW Type 1 font detection when using Ghostscript 9.53.3.
	Thanks to Deri James for suggesting the test procedure that
	uncovered this flaw.

2023-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am (uninstall_groffdirs): Remove "html.mono" and
	"html.node" directories corresponding to HTML version of our
	Texinfo manual.
	* doc/doc.am (uninstall-html): Uninstall HTML version of our
	Texinfo manual more reliably.

	Fixes a regression introduced by me in commit c2698aade, 6 April
	{my claim "we're only deleting files with this command, not
	directories" was not correct}.

2023-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[doc]: Handle output formats of our Texinfo manual more
	consistently.

	* doc/doc.am (install-doc): Add dependency on (Automake
	standard) target 'install-dvi'.
	(maintainer-clean-local): Remove our Texinfo manual in plain
	text format.
	(install-data-local): Add dependency on new target
	'install-txt'.
	(install-txt): Install our Texinfo manual in plain text format.
	(uninstall-local): Add dependency on new target 'uninstall-txt'.
	(uninstall-txt): Uninstall our Texinfo manual in plain text
	format.

	Thanks to T. Kurt Bond for noticing the discrepancy.

2023-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (install-pdf-local, install-html-local): Enable
	rules to work in out-of-tree builds.

2023-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (uninstall-hook): Drop dependency on
	"uninstall_mom"; this is not the appropriate place to declare
	it, and "uninstall_groffdirs" already depends on it in mom's
	Automake file.

2023-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Have more tests report output.

	* src/roff/groff/tests/ab_works.sh:
	* src/roff/groff/tests/handle_special_input_code_points.sh:
	* src/roff/groff/tests/initialization_is_quiet.sh:
	* src/roff/groff/tests/msoquiet_works.sh:
	* src/roff/groff/tests/soquiet_works.sh:
	* tmac/tests/an-ext_MR-works.sh:
	* tmac/tests/an_MR-works.sh: Do it.

2023-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Prevent failures when $GROFF_ENCODING is set.

	* src/roff/groff/tests/ab_works.sh:
	* src/roff/groff/tests/handle_special_input_code_points.sh:
	* src/roff/groff/tests/initialization_is_quiet.sh:
	* src/roff/groff/tests/msoquiet_works.sh:
	* src/roff/groff/tests/soquiet_works.sh:
	* tmac/tests/an-ext_MR-works.sh:
	* tmac/tests/an_MR-works.sh:
	* tmac/tests/an_font-remapping-does-not-affect-titles.sh: Unset
	$GROFF_ENCODING before running test because preconv(1) confounds
	these tests.

	Thanks to Alexis for reporting this problem.

2023-02-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Rename test.

	* tmac/tests/s_no-excess-space-around-displays.tmac: Rename...
	* tmac/tests/s_no-excess-space-around-displays.sh: ...to this.
	* tmac/tmac.am (tmac_TESTS): Update.

2023-02-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gropdf]: Revise tests to run unconditionally, rather than
	configuring them away at build time, which can cause a
	distribution archive to be incorrectly structured.  Update
	configuration notices when optional dependencies are absent.

	* font/devpdf/devpdf.am (font_devpdf_TESTS): Remove `USE_GROPDF`
	and `HAVE_URW_FONTS` conditionals.
	* m4/groff.m4 (GROFF_GROPDF_PROGRAM_NOTICE):
	(GROFF_URW_FONTS_NOTICE): Warn reader that a gropdf test failure
	is to be expected.

	Fixes <https://savannah.gnu.org/bugs/?63824> (2/2).

2023-02-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Revise tests to check for requisite programs at test
	time and skip if not found, rather than configuring them away at
	build time, which can cause a distribution archive to be
	incorrectly structured.

	* m4/groff.m4: Annotate requisite program list since we're
	violating the DRY principle.
	* src/roff/groff/groff.am (groff_TESTS): Populate
	unconditionally.

	* src/roff/groff/tests/html_works_with_grn_and_eqn.sh:
	* src/roff/groff/tests/smoke-test_html_device.sh: Check for
	requisite programs and skip test if any are not found.

	Fixes <https://savannah.gnu.org/bugs/?63824> (1/2).

2023-02-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man pages]: Define page-local `MR` fallback.

	[man pages]: Provide page-local fallback definition of new `MR`
	macro.  I didn't think I was going to have to do this, but the
	premier site on the web for viewing Linux man pages, Michael
	Kerrisk's man7.org, has been pulling snapshots of the pages
	themselves without upgrading the underlying macros, and so man
	page cross references set with `MR` are getting lost in its
	presentations.  (I acknowledge: Ingo Schwarze warned me
	something like this could happen.)  This definition is intended
	as a stopgap measure only.  I want to revert this after groff
	1.23 is released and has spread to some reasonable degree.

	* contrib/chem/chem.1.man:
	* contrib/eqn2graph/eqn2graph.1.man:
	* contrib/gdiffmk/gdiffmk.1.man:
	* contrib/glilypond/glilypond.1.man:
	* contrib/gperl/gperl.1.man:
	* contrib/gpinyin/gpinyin.1.man:
	* contrib/grap2graph/grap2graph.1.man:
	* contrib/hdtbl/groff_hdtbl.7.man:
	* contrib/mm/groff_mm.7.man:
	* contrib/mm/groff_mmse.7.man:
	* contrib/mm/mmroff.1.man:
	* contrib/mom/groff_mom.7.man:
	* contrib/pdfmark/pdfroff.1.man:
	* contrib/pic2graph/pic2graph.1.man:
	* contrib/rfc1345/groff_rfc1345.7.man:
	* man/groff.7.man:
	* man/groff_char.7.man:
	* man/groff_diff.7.man:
	* man/groff_font.5.man:
	* man/groff_out.5.man:
	* man/groff_tmac.5.man:
	* man/roff.7.man:
	* src/devices/grodvi/grodvi.1.man:
	* src/devices/grohtml/grohtml.1.man:
	* src/devices/grolbp/grolbp.1.man:
	* src/devices/grolj4/grolj4.1.man:
	* src/devices/gropdf/gropdf.1.man:
	* src/devices/gropdf/pdfmom.1.man:
	* src/devices/grops/grops.1.man:
	* src/devices/grotty/grotty.1.man:
	* src/devices/xditview/gxditview.1.man:
	* src/preproc/eqn/eqn.1.man:
	* src/preproc/eqn/neqn.1.man:
	* src/preproc/grn/grn.1.man:
	* src/preproc/pic/pic.1.man:
	* src/preproc/preconv/preconv.1.man:
	* src/preproc/refer/refer.1.man:
	* src/preproc/soelim/soelim.1.man:
	* src/preproc/tbl/tbl.1.man:
	* src/roff/groff/groff.1.man:
	* src/roff/nroff/nroff.1.man:
	* src/roff/troff/troff.1.man:
	* src/utils/addftinfo/addftinfo.1.man:
	* src/utils/afmtodit/afmtodit.1.man:
	* src/utils/grog/grog.1.man:
	* src/utils/hpftodit/hpftodit.1.man:
	* src/utils/indxbib/indxbib.1.man:
	* src/utils/lkbib/lkbib.1.man:
	* src/utils/lookbib/lookbib.1.man:
	* src/utils/pfbtops/pfbtops.1.man:
	* src/utils/tfmtodit/tfmtodit.1.man:
	* src/utils/xtotroff/xtotroff.1.man:
	* tmac/groff_man.7.man.in:
	* tmac/groff_me.7.man:
	* tmac/groff_ms.7.man:
	* tmac/groff_trace.7.man:
	* tmac/groff_www.7.man: Do it.

	Fixes <https://savannah.gnu.org/bugs/?63825>.  Thanks greatly to
	Alexis for identifying an issue with mandoc(1)'s handling of an
	earlier iteration of this fallback, and to John Gardner for
	identifying a method of detecting mandoc as the renderer at
	formatting time.

2023-02-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an_TS-do-not-keep-tables-when-cR-set.sh: Improve
	portability of script by using shell constructs instead of the
	nonstandard GNU coreutils 'seq' utility.  Resolves test failure
	on Solaris 10.
	* HACKING: Document this problem.

2023-02-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_MAKE_DEFINES_RM): Test the make(1) in the
	environment variable $MAKE if defined, not a literal "make".
	Required on (some) Solaris 10 configurations where traditional
	make(1) is not installed but GNU make is installed as "gmake".

2023-02-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/latin2_works.sh: Fix missing backslash in printf.
	Solaris printf(1) was sensitive to this error; macOS and GNU
	printf were not.  Fixes a test failure on Solaris 11.

2023-02-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/regression_savannah_58153.sh: Improve
	portability.  Avoid the unpredictability of implementations when
	putting backslashes inside a groff-piped printf shell command
	inside a here document inside a command substitution by changing
	the groff escape character to something meaningless to the shell
	and to printf ('@').  Fixes a test failure on Solaris 11.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/Foundry.in: Recognize URW foundry replacements for
	Helvetica Bold-Oblique and Helvetica Oblique under the file
	names "NimbusSans-BoldItalic.t1" and "NimbusSans-Italic.t1",
	respectively.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (uninstall-pdf): Clean more fastidiously; try to
	remove the configured `pdfdocdir` in the event it is empty, but
	do not fail if it isn't.  (It can be a directory shared with
	other groff components; we don't know in what order the
	uninstall targets will serialize, but the last one run should
	succeed.)

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Detangle "pdfroff" and "gropdf" configuration (2/2).

	* m4/groff.m4: Give pdfroff its own Autoconf macros to handle
	dependency checking, build objectives, and user notice.
	(GROFF_PDFROFF_DEPENDENCIES_CHECK): New macro requires
	`GROFF_AWK_PATH` and `GROFF_GHOSTSCRIPT_PATH`, determines
	whether pdfroff can be used at build time, and (if not)
	constructs part of message to be shown to user explaining why.
	(GROFF_PDFROFF_PROGRAM_NOTICE): New macro requires
	`GROFF_PDFROFF_DEPENDENCIES_CHECK` and emits message if needed.
	(GROFF_GHOSTSCRIPT_AVAILABILITY_NOTICE): Drop mention of impact
	on pdfroff since its dedicated notice covers this now.
	* configure.ac: Call the new macros at appropriate times.
	Produce a new Automake macro, `USE_PDFROFF`, to replace
	inapposite use of `USE_GROPDF` in pdfmark.am.
	* contrib/pdfmark/pdfmark.am: Use `USE_PDFROFF` instead of
	`USE_GROPDF`.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Detangle "pdfroff" and "gropdf" configuration (1/2).

	* m4/groff.m4 (GROFF_GROPDF_DEPENDENCIES_CHECK): Add
	`AC_REQUIRE`ment on `GROFF_URW_FONTS_CHECK`.  Per discussion
	with Deri James, if _either_ Ghostscript or the URW fonts are
	avilable, gropdf will be fully functional, consequent to commit
	d5515, 22 June.  Drop dependency on awk; it is used only at
	configuration time (in an Autoconf macro) and since Savannah
	#62775 was resolved (19 September), it has not been strictly
	necessary.  (It is useful for searching more locations for URW
	fonts, but several others are searched even if it is absent.)
	Stop populating notice text here, instead moving it...
	(GROFF_GROPDF_PROGRAM_NOTICE): ...here, since it no longer needs
	to be dynamically constructed.

	Continues <https://savannah.gnu.org/bugs/?63808>.  Thanks to
	Deri James for the continued discussion.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Rename `GROFF_CHECK_GROPDF_PROGRAMS` macro to
	`GROFF_GROPDF_DEPENDENCIES_CHECK` to generalize for greater
	accuracy in forthcoming change.

	* configure.ac:
	* m4/groff.m4: Do it.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gropdf]: Don't run automated tests if 'gropdf' will be
	operating with reduced function.  If neither Ghostscript nor the
	URW fonts are available at configuration time, there is no point
	testing for successful build-time population of the font
	descriptions for the default and URW foundries.

	* font/devpdf/devpdf.am (font_devpdf_TESTS) [USE_GROPDF]: Run
	"check-default-foundry" only if gropdf is fully functional.
	(font_devpdf_TESTS) [USE_GROPDF && HAVE_URW_FONTS]: Run
	"check-urw-foundry" only if the URW fonts were found.

	Continues <https://savannah.gnu.org/bugs/?63808>.  Thanks to
	Deri James for the continued discussion.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gropdf]: Rename tests to more accurately characterize their
	purpose.

	* font/devpdf/tests/basic-fonts-present.sh:
	* font/devpdf/tests/urw-fonts-present.sh: Rename these...
	* font/devpdf/tests/check-default-foundry.sh:
	* font/devpdf/tests/check-urw-foundry.sh: ...to these.
	* font/devpdf/devpdf.am (font_devpdf_TESTS): Reflect rename.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gropdf]: Revise tests to be foundry-focussed.

	* font/devpdf/tests/basic-fonts-present.sh: Stop trying to match
	font descriptions in the "devps" directory with ones in
	"devpdf"; instead, test whether "BuildFoundries" did its job.
	Test for font descriptions corresponding to the full 35
	PostScript Level 2 font repertoire, plus groff's "EURO".
	* font/devpdf/tests/urw-fonts-present.sh: Drop stale comment and
	rename variable for better parallelism with the other test
	above.

	Continues <https://savannah.gnu.org/bugs/?63808>.  Thanks to
	Deri James for the continued discussion.

2023-02-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Tweak fix to Savannah #63768.

	* tmac/an.tmac (MR): Ensure `an*url` always has a value,
	defaulting to "format 1" (man:page(section)).  Resequence the
	macOS URL formats to sort the contemporary one before the
	others.
	* tmac/man.local: Reflect resequencing of integer assignments to
	formats.  Clarify historicity of annotations.

	Continues <https://savannah.gnu.org/bugs/?63768>.  Thanks to
	John Gardner for further discussion.

2023-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Port a test to Solaris 11 sed.

	* tmac/tests/s_TC-works-with-percent-in-custom-titles.sh: Put
	newlines after opening braces in sed scripts.  macOS and GNU sed
	tolerate their absence, but this sed does not.
	* HACKING: Document this problem.

2023-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.am (groff_TESTS) [!USE_GROHTML]: Don't
	test the 'grohtml' driver if we know it won't work.

2023-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/\
	device_control_escapes_express_basic_latin.sh: Use printf(1),
	which is often a shell built-in command, more consistently.
	Double backslashes intended as literals in the format string,
	and single-quote format strings using them.  Fixes test failure
	seen on Solaris 11 with GNU Bash 4.4 and ksh 93u+ (2012-08-01).

2023-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an_use-input-traps-correctly.sh: Explicitly test
	`SM` and `SB` with 'ps' output device.  If one set
	GROFF_TYPESETTER=utf8 in the test environment, these test cases
	would fail.  Thanks to John Gardner for the report.

2023-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Add Automake conditional, `HAVE_GHOSTSCRIPT`, so
	that we can populate the list of PDF device font tests
	dynamically.  Call new macro
	`GROFF_GHOSTSCRIPT_AVAILABILITY_NOTICE`.  Call
	`GROFF_GHOSTSCRIPT_VERSION_NOTICE` after it, but before
	`GROFF_URW_FONTS_NOTICE`.
	* m4/groff.m4 (GROFF_AWK_NOTICE): New macro produces warning if
	no awk could be found.  This reduces gropdf functionality, but
	so do missing URW fonts, so we report this problem separately.
	Report the names under which we sought it, since there's a
	configure script option for that.
	(GROFF_GHOSTSCRIPT_AVAILABILITY_NOTICE): New macro explains
	consequences of missing optional dependency on Ghostscript
	program: reduced grohtml functionality, nonfunctional pdfroff.
	Report the names under which we sought it, since there's a
	configure script option for that.
	(GROFF_CHECK_GROPDF_PROGRAMS): Better characterize gropdf's
	reduced function, pointing out the ways in which it would be
	more useful if the dependencies were met.  Also simplify the
	computational grammar.
	(GROFF_URW_FONTS_NOTICE): Identify 'U' as the foundry name
	gropdf uses for the URW fonts.  Confirm continuing availability
	of most recent URW fonts release; bump date.
	* font/devpdf/devpdf.am: Test availability of "basic" (PDF base
	14) fonts (plus groff's "EURO") if either Ghostscript or URW
	fonts are available.  Test availability of URW fonts (35) only
	if Ghostscript _and_ the URW fonts were found at configuration
	time.

	Fixes <https://savannah.gnu.org/bugs/?63808>.  Thanks to Deri
	James for the report and extremely helpful pseudocode.

2023-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_GHOSTSCRIPT_VERSION_CHECK,
	GROFF_URW_FONTS_NOTICE): Add macro dependency on
	`GROFF_GHOSTSCRIPT_PATH`, which should have been there already.
	(GROFF_GROHTML_PROGRAM_NOTICE): Add macro dependency on
	`GROFF_CHECK_GROHTML_PROGRAMS`, which should have been there
	already.

	(GROFF_CHECK_GROHTML_PROGRAMS, GROFF_PNMTOOLS_CAN_BE_QUIET):
	Move `AC_REQUIRE` expansions to precede shell variable
	assignments (after checking that the required macros don't
	clobber the assignments we're making).

2023-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/tests/basic-fonts-present.sh: Revise test again,
	per feedback from Deri James.  Even without Ghostscript or URW
	fonts available, gropdf can generate valid PDF documents; it
	simply can't embed fonts in general (without further
	arrangements made on the host system), which means it is
	restricted to the PDF base 14 fonts.  That's enough for many
	purposes, including generating our compiled man pages document
	{with minor degradations to the typeface lists in gropdf(1) and
	grops(1)}.  Drop the 'gs' command check, which also didn't check
	for the name of the Ghostscript interpreter determined by the
	"configure" script.  Replace dynamically generated font list
	with a static one (the base 14 fonts plus groff's EURO).

2023-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/tests/basic-fonts-present.sh: Revise test.
	Improve explanation of why we're looking for the gs(1) command
	in a font availability test.  Prefix diagnostic output with name
	of test script.  Perform a search for the 'ps' device font
	descriptions that will work in more build scenarios (i.e., don't
	assume an out-of-tree build taking place in an immediate
	subdirectory of the source).  Distinguish failure to find the
	font descriptions from a failure to locate the 'gs' command,
	skipping the test in both scenarios.  Reduce noise in output.
	* m4/groff.m4 (GROFF_CHECK_GROPDF_PROGRAMS): Revise warning
	issued when awk and Ghostscript are unavailable; gropdf will not
	be completely inoperative.  Characterize its reduced function.

	Thanks to Deri James in <https://lists.gnu.org/archive/html/\
	groff-commit/2023-02/msg00089.html> for prompting me to take a
	another look at this.

2023-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/latin2_works.sh:
	* tmac/tests/latin5_works.sh:
	* tmac/tests/latin9_works.sh: Port to work around macOS's
	apparently POSIX non-conforming 'od' command.  Use single-byte
	octal output format instead of "character", and update test
	expectations accordingly.  Apparently gratuitously, macOS also
	puts more spaces after the octal address field when using this
	output format.
	* HACKING: Document, and elaborate upon, this problem.

2023-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Port a test to work with macOS sed.

	* tmac/tests/doc_heading-font-remapping-works.sh: Put semicolons
	between commands and closing braces in sed script.  Put each of
	multiple closing braces on a separate input line, because macOS
	doesn't accept them otherwise.  Resolves test failure observed
	on macOS.
	* HACKING: Document the closing brace sequence problem.

2023-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Port a test to work with macOS sed.

	* tmac/tests/an_TS-adds-no-vertical-space.sh: Put semicolons
	between commands and closing braces in sed script.  Separate
	command stream into multiple '-e' expressions, breaking them
	after branch and label commands.  Resolves test failure observed
	on macOS.
	* HACKING: Document the above problems.

2023-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/\
	some_escapes_accept_newline_delimiters.sh: Weaken regexes in two
	test cases to accommodate excessive output from macOS's 'od'
	command.  Resolves test failure seen on macOS.
	* HACKING: Add section "Writing Tests" and document the above
	since this is the second time I've cracked my shin on this.

2023-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/tests/basic-fonts-present.sh: Skip test if 'gs'
	command not available.  The test is to ensure that gropdf will
	produce sound documents using the base fonts from PostScript,
	but since gropdf requires Ghostscript to do this (as noted in
	our "./configure" messages), it makes no sense to validate font
	availability if the program is absent.  Resolves test failure
	seen on macOS with minimal dependencies installed.

2023-02-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Filling and Adjustment): Say more
	about the consequences of a break.

	Fixes <https://savannah.gnu.org/bugs/?63777>.  Thanks to Dave
	Kemper for the report.

2023-02-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Re-re-christen 'ESCAPE_AMPERSAND' ('\&').  Now call it a
	{non-transparent} "dummy character".  Also rechristen
	'ESCAPE_RIGHT_PARENTHESIS', ('\)') as the "transparent dummy
	character"; it has no impact on sentence-ending detection.

	* doc/groff.texi:
	* doc/meref.me.in:
	* man/groff.7.man:
	* man/groff_diff.7.man:
	* man/roff.7.man:
	* src/preproc/refer/refer.1.man:
	* tmac/groff_man.7.man.in: Do it.

	Fixes <https://savannah.gnu.org/bugs/?62816>.  Thanks to Dave
	Kemper for the report and to the groff mailing list for the
	vigorous discussion.  I don't expect my solution to please
	everyone.

2023-02-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Add internal register `an*MR-URL-format` to
	select from a few known formats of man page hyperlink.  There
	are three known on macOS, and one used everywhere else.
	* tmac/man.local: Document this feature so macOS users can enjoy
	the OSC 8 hyperlink feature if their terminal application
	supports it.

	I hope that this feature will be a temporary measure while macOS
	implements support for the man page URL format used everywhere
	else in the world.

	Fixes <https://savannah.gnu.org/bugs/?63768>.  Thanks to John
	Gardner for the report, research, consultation, and testing.

2023-02-11  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[BuildFoundries]: Fails if neither ghostcript nor URW fonts
	are installed.

	* font/devpdf/util/BuildFoundries.pl: When the change to hold
	paths in an array, rather than a delimited string (see commit
	4ae4aeb6555f4f16c28fcb03eb1f56577826054c), the FindGSpath
	subroutine should return a pointer to an empty array when the
	call to ghostscript fails, rather than return an empty string,
	as was done previously.

	See <https://lists.gnu.org/archive/html/groff/2023-02/\
	msg00042.html>; thanks to Bruno Haible for the report.

2023-02-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Switch to using system's assert.h header file.  It is futile to
	attempt to preserve compatibility with ISO C90 systems by
	providing a bespoke predicate-reporting assert() (a C99 feature)
	when gnulib, which we require, itself demands C99.  This ensures
	that `static_assert` remains defined so that gnulib can use it.
	Thanks to Bruno Haible for the consultation.
	<https://lists.gnu.org/archive/html/groff/2023-02/msg00034.html>

	* src/include/assert.h: Delete.

	* src/devices/grodvi/dvi.cpp:
	* src/devices/grolbp/lbp.cpp:
	* src/devices/grolj4/lj4.cpp:
	* src/include/itable.h:
	* src/include/stringclass.h:
	* src/libs/libbib/linear.cpp:
	* src/libs/libbib/search.cpp:
	* src/libs/libdriver/printer.cpp:
	* src/libs/libgroff/assert.cpp:
	* src/libs/libgroff/color.cpp:
	* src/libs/libgroff/errarg.cpp:
	* src/libs/libgroff/font.cpp:
	* src/libs/libgroff/nametoindex.cpp:
	* src/libs/libgroff/prime.cpp:
	* src/libs/libgroff/relocate.cpp:
	* src/libs/libgroff/searchpath.cpp:
	* src/preproc/eqn/box.cpp:
	* src/preproc/eqn/delim.cpp:
	* src/preproc/eqn/pile.cpp:
	* src/preproc/eqn/script.cpp:
	* src/preproc/html/pre-html.cpp:
	* src/preproc/pic/pic.h:
	* src/preproc/preconv/preconv.cpp:
	* src/preproc/soelim/soelim.cpp:
	* src/roff/groff/groff.cpp:
	* src/roff/troff/troff.h:
	* src/utils/hpftodit/hpftodit.cpp:
	* src/utils/indxbib/indxbib.cpp:
	* src/utils/lkbib/lkbib.cpp:
	* src/utils/lookbib/lookbib.cpp:
	* src/utils/tfmtodit/tfmtodit.cpp: Respell "assert.h" inclusion
	with angle brackets instead of quotation marks.

	Fixes <https://savannah.gnu.org/bugs/?63078>.

2023-02-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (token::next): Use correct kind of
	null object in comparison.  Fixes latent bug that would be
	exposed if we were to migrate from zero literals to `nullptr`.

2023-02-09  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf] Parse multiple entries in 'papersize' as specified in
	the groff_font man page. Reported by Ben Wong and fix based on
	his patch, thanks.

	* src/devices/gropdf/gropdf.pl: Parse papersize string for
	possible multiple (space separated) entries. First valid entry
	wins.

	Fixes https://savannah.gnu.org/bugs/?63757

2023-02-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	Correct numerous typos and solecisms throughout the source tree.

	* ChangeLog:
	* ChangeLog.115:
	* ChangeLog.116:
	* ChangeLog.117:
	* ChangeLog.118:
	* ChangeLog.119:
	* ChangeLog.121:
	* ChangeLog.122:
	* Makefile.am:
	* NEWS:
	* PROBLEMS:
	* README:
	* contrib/chem/chem.am:
	* contrib/chem/chem.pl:
	* contrib/glilypond/README.txt:
	* contrib/glilypond/glilypond.pl:
	* contrib/hdtbl/groff_hdtbl.7.man:
	* contrib/mm/ChangeLog:
	* contrib/mm/m.tmac:
	* contrib/pdfmark/pdfmark.ms:
	* doc/automake.mom:
	* doc/groff.texi:
	* doc/me-revisions:
	* doc/webpage.ms:
	* m4/lib-link.m4:
	* man/groff.7.man:
	* man/groff_diff.7.man:
	* man/roff.7.man:
	* src/devices/grohtml/post-html.cpp:
	* src/devices/grolbp/lbp.h:
	* src/devices/gropdf/TODO:
	* src/devices/gropdf/gropdf.1.man:
	* src/devices/gropdf/gropdf.pl:
	* src/devices/xditview/ChangeLog:
	* src/devices/xditview/xditview.c:
	* src/libs/libdriver/input.cpp:
	* src/libs/libgroff/glyphuni.cpp:
	* src/preproc/eqn/eqn.1.man:
	* src/preproc/grn/gprint.h:
	* src/preproc/grn/main.cpp:
	* src/preproc/html/pre-html.cpp:
	* src/preproc/preconv/preconv.cpp:
	* src/preproc/tbl/table.cpp:
	* src/roff/groff/pipeline.c:
	* src/roff/groff/tests/substring_works.sh:
	* src/roff/groff/tests/
	use_point_size_escape_with_single_digit_arg.sh:
	* src/roff/troff/div.cpp:
	* src/roff/troff/input.cpp:
	* src/roff/troff/troff.1.man:
	* src/utils/grog/grog.pl:
	* src/utils/indxbib/indxbib.cpp:
	* src/utils/tfmtodit/tfmtodit.1.man:
	* tmac/doc-old.tmac:
	* tmac/doc.tmac:
	* tmac/groff_man.7.man.in:
	* tmac/hyphen.fr: Do it.

	Fixes <https://savannah.gnu.org/bugs/?63589>.  Thanks to Bjarni
	Ingi Gislason for the report.

2023-02-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Drop XFAIL test.  It was written with an unclear
	understanding of how DWB (AT&T) and Heirloom Doctools troff
	behaved.  The individual checks might come back, modified.

	* src/preproc/tbl/tests/table-lacks-spurious-top-border.sh:
	Delete.

	* src/preproc/tbl/tbl.am (tbl_TESTS): Drop it.
	(tbl_XFAIL_TESTS, XFAIL_TESTS): Drop now empty assignment and
	unnecessary update, respectively.

2023-02-04  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	Update gnulib submodule

	gnulib now points on sha1 4e9fcc7b84fcac07a3e5a3cd5f66d1ff320dc8e8

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix bugs using boxes or vertical rules at table edges on
	nroff devices, particularly when combined with region or column
	expansion.

	* src/preproc/tbl/table.h (class table): Add `GAP_EXPAND`
	enumeration constant.  James Clark seems to have designed GNU
	tbl carefully to avoid distinguishing region expansion from
	column expansion in a categorical way, but I needed a way for
	formatting-time logic to know which was in use.  (Column
	expansion, the "x" modifier, expands columns--i.e., text.
	Region expansion expands [or compresses] the _gaps_ between
	columns.)
	* src/preproc/tbl/main.cpp (process_options): Set `GAP_EXPAND`
	flag in table if "expand" region option seen.
	* src/preproc/tbl/table.cpp: Add new macro `LEFTOVER_FACTOR_REG`
	to name a new roff register for the remainder of gap-expansion
	space when the amount of space available for expansion is
	divided by the number of gaps.
	(table::compute_overall_width): If _not_ expanding a table in
	either respect and in nroff mode, reduce line length by 1n for
	each of any left and right border (because the vertical lines
	eat character cells).  This prevents bordered or boxed tables
	from being overset even when they use neither expansion feature.
	(table::compute_separation_factor): If gap-expanding a table,
	store any remainder from the division used to compute the
	separation factor into the new `LEFTOVER_FACTOR_REG`.
	(table::compute_column_positions): Insert that remainder into
	the gap before the last (rightmost) column of the table.  This
	_could_ be done more elegantly by spreading each en in a
	symmetric way across a subset of the gaps.  (It is necessarily a
	subset by the pigeonhole principle.)  But it didn't seem worth
	the effort for a feature (region expansion) that few users
	employ.  (Usually what you want is the "x" column modifier.)
	Alternatively, "forget it, Jake--it's a terminal emulator".

	* src/preproc/tbl/tbl.am (tbl_XFAIL_TESTS): Remove now-passing
	tests.

	Fixes <https://savannah.gnu.org/bugs/?63640> and
	<https://savannah.gnu.org/bugs/?63749>.

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::compute_column_positions):
	Stop multiplying the gaps at the left and right edges of a table
	{which occur when it is boxed or has a leading and/or trailing
	vertical line} by the column separation factor.  Only interior
	column gaps should be spread.  This change prevents tables using
	the "expand" region option from being overset (exceeding the
	line length), but might not (yet) fully expand to that length on
	low-resolution devices due to integer roundoff.

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::compute_total_separation)
	(table::compute_separation_factor, table::compute_widths): Add
	comments to generated roff output to assist the mystified user.

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Refactor.

	* src/preproc/tbl/table.cpp:
	* src/preproc/tbl/table.h: Rename `compute_expand_width` to
	`compute_overall_width`, since this member function is used on
	_all_ tables, not just those undergoing column or gap expansion.
	For instance, in a post-groff 1.22.4 development, it throws a
	diagnostic if an unexpanded table overruns the line length.
	* src/preproc/tbl/table.cpp (table::compute_widths): Update call
	site of `compute_overall_width`.
	* src/preproc/tbl/table.cpp: Split the roff register behind the
	`EXPAND_REG` C++ preprocessor macro into two, adding
	`AVAILABLE_WIDTH_REG`.  Annotate the distinction.
	(compute_overall_width): Annotate.  Move and conditionalize
	logic so as not to produce as much unnecessary roff output.

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (main): Avoid reading from invalid
	memory upon failure to open an input file.

	Fixes <https://savannah.gnu.org/bugs/?63751>.

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/lex.cpp (get_delimited_text): Avoid reading
	from invalid memory when throwing diagnostic.  Duplicate
	`filename` string, then free it on all paths out of function.

	Fixes <https://savannah.gnu.org/bugs/?63214>.

2023-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Add more tests.

	* src/preproc/tbl/tests/boxes-and-vertical-rules.sh:
	* src/preproc/tbl/tests/expand-region-option-works.sh:
	* src/preproc/tbl/tests/x-column-modifier-works.sh: Do it.

	* src/preproc/tbl/tbl.am (tbl_TESTS): Run tests.
	(tbl_XFAIL_TESTS): Add; future changes will resolve these.

2023-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::compute_column_positions):
	If a table has "left separation" (it is boxed, or has a vertical
	rule on the left-hand side), increase the first column's start
	register value by 1n, for symmetry with the right-hand size.

	* src/preproc/tbl/tests/check-horizontal-line-length.sh:
	* src/preproc/tbl/tests/check-line-intersections.sh:
	* src/preproc/tbl/tests/check-vertical-line-length.sh: Update
	output expectations.

	* src/preproc/tbl/tbl.am (tbl_XFAIL_TESTS): Remove now-passing
	test.

	See <https://savannah.gnu.org/bugs/?61597> for background.

2023-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::compute_total_separation):
	Trivially refactor; rename loop indices so it's obvious which
	dimension of a matrix they're referring to.

2023-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::determine_row_type)
	(table::compute_widths, table::do_row): Boolify some local ints.

2023-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Refactor handling of vertical lines in format.  Validate
	input more strictly.  Add diagnostics when vertical lines are
	redundant with box borders.

	* src/preproc/tbl/main.cpp (process_format): Shift diagnostic
	about excess vertical lines in a sequence at the beginning of a
	row description to later, after the first proper column
	descriptor has been interpreted.  Normalize a sequence of more
	than two consecutive vertical lines to 2 when they occur at the
	beginning of a row description.  Unconditionally update
	`list->vline` and reset `vline_count` once we start looking for
	modifiers, since we know we've finished any sequence of vertical
	lines, and at the end of a row definition.  Rename and retype
	loop variable int `success` to Boolean
	`is_valid_modifier_sequence`.  Drop now-invalid assertion.
	* src/preproc/tbl/table.cpp (table::add_vlines): Throw new
	diagnostics when vertical lines are redundant with box borders.
	Add assertion to ensure we got a valid vertical line value (0,
	1, or 2) from `process_format`.  Throw these only once per table
	format, not for every row.

2023-01-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (process_table): Trivially refactor.
	Rename `form` to `fmt` to imply "format", not "form".

2023-01-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (process_format): Throw error
	diagnostic if more than 2 vertical lines are specified at the
	beginning of a row definition.

	Fixes <https://savannah.gnu.org/bugs/?63731>.

2023-01-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (process_format): Recast diagnostic
	message to refer to character by its Unicode name and generalize
	to accurately cover additional circumstance of excess '|'
	symbols at end of row definition.

2023-01-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/ms.ms: Remove redundant initializations.

2023-01-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/ms.ms: Define appropriate hyphen-minus mapping on 'cp1047'
	output device.

2023-01-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (TE): Enable no-space mode after outputting the
	display distance vertically, replacing any inter-paragraph
	distance that might follow.

2023-01-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix misleading diagnostic message.

	* src/preproc/html/pre-html.cpp (main): The suggestion should be
	to re-run the formatter (groff, troff), not "pre-grohtml", with
	a different output driver since the document may be malformed.

2023-01-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (process_format): Fix code hygiene
	nit: nullify `list` pointer after freeing its target.

2023-01-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Really fix Savannah #63449.

	* src/preproc/tbl/main.cpp (process_format): "Or" on the
	`HAS_TOP_VLINE` flag if the format specification begins with a
	"|"; the beginning is a separate state in the FSM used to parse
	the description.  I missed it in commit 0e93ab4102, 1 December.

	Fixes <https://savannah.gnu.org/bugs/?63449>.

2023-01-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/tests/\
	do-not-overdraw-page-top-in-nroff-mode.sh: Correct erroneous
	check of test output, and add two more test cases.

2023-01-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Move the saving of the hyphenation mode from
	the "top level" to...
	(mY): ...this new macro.
	(SY, mQ, MR): Call `mY` before disabling hyphenation.

	Problem introduced by me in commit 096c2f0567, 16 February.
	"an-ext.tmac" gets sourced by "an.tmac" before any
	command-line setting of the `HY` register is handled, so (for
	groff) the stored hyphenation mode was the default for the
	language, not reflecting user disablement.  The synopsis macros,
	which do not have an alternate implementation in "an.tmac" for
	leverage of groff features, were causing hyphenation to be
	resurrected (after `YS`) even if the user had disabled it.
	Saving the hyphenation mode anew upon entry to these macros is
	arguably inefficient, but it is more correct since a man page
	could conceivably manipulate the automatic hyphenation mode
	{even if that's not recommended outside of tbl(1) text blocks}.

2023-01-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add regression test for hyphenation getting wrongly
	restored by `YS`, `ME`, `UE`, and `MR` macros.

	* tmac/tests/an_HY-register-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2023-01-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (Sh, Ss): Narrow scope of font remappings
	lexically and restrict remapping to the heading font family (if
	any) to avoid undesired remapping of fonts in page headers if,
	say, a (sub)section heading begins just prior to a page
	break--which is ugly anyway and should be avoided, but the
	package has no keep macros and solving that problem in an
	automatic way promises to be complex.

2023-01-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (MT, UR): Throw style warning if macro called
	without (exactly one) argument.

2022-12-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/groff-man-pages.pdf): Set (sub)section
	headings in Helvetica bold in compiled man pages, as a test and
	demonstration of the `HF` feature's application to both man(7)
	and mdoc(7) documents.

2022-12-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `HF` string.

	* tmac/doc.tmac (initialization): Add logic supporting `HF`
	string just as our man(7) implementation does.  If the font name
	ends with `B` (as the default does), set
	`doc-remap-I-style-in-headings` register and extract font
	family, which can be empty (as is the default).
	* tmac/mdoc/doc-common (Sh, Ss): If
	`doc-remap-I-style-in-headings` register set, perform (and
	unwind) font remapping of italic to bold-italic face.
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Define `doc-Sh-font` in terms of `HF`.

	* tmac/tests/doc_heading-font-remapping-works.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	* tmac/groff_mdoc.7.man (Options): Document it.
	* NEWS: Update item.

	Fixes last part of <https://savannah.gnu.org/bugs/?63046>.

2022-12-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Revise "fallback" character definitions in several
	respects for Unicode characters from General Punctuation block.

	* tmac/fallbacks.tmac: Comment out fallbacks for U+200B, U+2010,
	U+2011, and U+201[89CD], due to ineffectuality or apparent groff
	bugs.  Redefine U+2012 fallback to include hair space (\^)
	around synthetic figure dash.  Redefine U+2016 to use `\[ba]`
	special characters instead of ordinary `|` characters to dodge
	possible character translations by user.

	Fixes part of <https://savannah.gnu.org/bugs/?63354>.  Thanks to
	Dave Kemper for the (multifarious) discussion.

2022-12-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Invoking groff, Built-in Registers):
	* man/groff.7.man (Writable predefined registers):
	* src/roff/groff/groff.1.man (Environment):
	* src/roff/troff/troff.1.man (Environment): Replace erroneous
	reference to ctime(3) with localtime(3).

	Fixes <https://savannah.gnu.org/bugs/?63509>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-12-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Fix potential problem(s) in trap handler.

	* src/roff/groff/tests/smoke-test_html_device.sh: Move call of
	`cleanup` function from end of script to after the tests that
	generate temporary files have been run, and before script
	possibly exits with status 77 to skip some checks.  Within trap
	handler, mask trapped signals while running handler.
	(cleanup): Reset trap dispositions to default after removing
	files; once the temporary files are gone, we no longer need a
	trap handler.  One might already be running however, and this
	ensures that its "suicide" ("kill -s INT $$") will succeed.

2022-12-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `FT` register.

	* tmac/doc.tmac (initialization): Add logic supporting `FT`
	register just as our man(7) implementation does.
	* tmac/mdoc/doc-common (doc-set-up-titles): Plant footer trap in
	validated user-requested location.
	* tmac/groff_mdoc.7.man (Options): Document it.
	* NEWS: Update item.

	Fixes part of <https://savannah.gnu.org/bugs/?63046>.

2022-12-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Fix code style nit: use `as` requests to
	avoid overlong input lines.

2022-12-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac: Inform user we're ignoring their "-rD1" setting
	if also formatting HTML; parallels groff man(7) behavior.

2022-12-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac: Trivially refactor.  Relocate handling of `D`
	command-line register to prepare for greater synchronization
	with groff man(7).

2022-12-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp: Trivially refactor.  Rename
	{portion of} internal register to include an interword hyphen
	for readability.

2022-12-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Change default line length to 6.5 inches.

	* tmac/s.tmac (par@load-init): Do it.

	* doc/groff.texi (ms Document Control Settings):
	* doc/ms.ms (Document control settings):
	* tmac/groff_ms.7.man (Document control settings): Document it.

	* tmac/tests/s_honor-MINGW-when-two-columns.sh:
	* tmac/tests/s_mark-column-start-correctly.sh: Update test
	expectations.

	* NEWS: Add item.

2022-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TH): Relocate `an-break-body-text` trap to be
	one half-inch above footer (instead of twice the footer
	distance).  I reason that anyone who customizes `FT` is doing so
	to overprint some kind of material at the bottoms of pages, or
	simply to make the margin larger.  (One then wonders why we
	don't have an `HD` register for the top.)  Also remove register
	when done with it.
	* tmac/groff_man.7.man.in (Options) <FT>: Document this.

2022-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TH): Trivially refactor.  Rename
	`an-footer-location` to `an*footer-location` and set page traps
	in order descending the page.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `X` register.

	* tmac/doc.tmac (initialization): Add logic supporting `X`
	register just as our man(7) implementation does.
	* tmac/groff_mdoc.7.man (Options): Document it.
	* NEWS: Update item.

	Fixes part of <https://savannah.gnu.org/bugs/?63046>.

2022-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Add unit test for `X` register.

	* tmac/tests/doc_X-register-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac (Nm): Fix `if` -> `ie` typo/thinko.

	Fixes <https://savannah.gnu.org/bugs/?63527>.  Thanks to John
	Gardner for the report.

2022-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/doc_Nm-works.sh: Add more checks.

2022-12-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/smoke-test_html_device.sh: Add checks for
	inlining of images when tbl(1) or eqn(1) used.

2022-12-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac (reload-man): Unplant `doc-break-body-text`
	trap, added in commit 892703b17e, 6 September.  Its survival
	into man(7) pages didn't seem to cause any problems but I have
	no confidence that will remain true forever.

2022-12-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (initialization): Fix problem with `FT` register
	validation.  Small but valid values were being rejected due to
	inappropriate use of scaling operator.  Also throw user a bone
	by expressing what size '1v' is for the output device, in basic
	units.

2022-12-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man, mdoc]: Fix Savannah #63500.  Support use of `P` (initial
	page number) register when batch rendering, regardless of
	switching macro packages between man(7) and mdoc(7) or setting
	of `C` (continuous numbering) register.  (`P` without `C` means
	"start numbering each rendered document at \n[P]".)

	* tmac/an.tmac (an-end): Call `an*break-page-with-new-number`
	instead of invoking `bp`.
	(an*break-page-with-new-number): If `P` is set and `C` is not,
	use value of `P` as the next page number.
	(TH): If `C` register is set, remove `P` register after ending a
	previous document.
	(initialization): If `P` is set, assign the page number using
	the `pn` request if the transition to the first formatted page
	has not yet occurred; otherwise update page number register `%`
	directly.  Also ignore it with diagnostic if `ps4html` register
	{for grohtml's internal use} is set.  Add explanatory comment.

	* tmac/mdoc/doc-common (Dd): If `C` register is set, remove `P`
	register after ending a previous document.
	(doc-end-macro): Call `doc-break-page-with-new-number` instead
	of invoking `bp`.
	(doc-break-page-with-new-number): If `P` is set and `C` is not,
	use value of `P` as the next page number.
	* tmac/doc.tmac (initialization): If `P` is set, assign the page
	number using the `pn` request if the transition to the first
	formatted page has not yet occurred; otherwise update page
	number register `%` directly.  Also ignore it with diagnostic if
	`ps4html` register (for grohtml's internal use) is set.  Add
	explanatory comment.

	Fixes <https://savannah.gnu.org/bugs/?63500>.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `P` register.

	* tmac/doc.tmac (initialization): Add logic supporting `P`
	register just as our man(7) implementation does.
	* tmac/groff_mdoc.7.man (Formatting with groff, troff, and
	nroff): Document it.
	* NEWS: Update item.

	Fixes part of <https://savannah.gnu.org/bugs/?63046>.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Add unit tests for man/mdoc `P` register.

	* tmac/tests/an_P-register-works.sh:
	* tmac/tests/andoc_P-register-works.sh:
	* tmac/tests/doc_P-register-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run tests.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man, mdoc]: Refactor.  Rename a Boolean register to more
	clearly communicate its purpose.  This also reverses its sense.

	* tmac/an.tmac (TH): Rename `an-is-first-page-of-document` to
	`an*need-titles-reset`.  Drop redundant store.  Reverse sense of
	test.
	(initialization): Initialize it to zero.

	* tmac/mdoc/doc-common (Dd): Rename
	`doc-is-first-page-of-document` to `doc-need-titles-reset`.
	Drop redundant store.  Reverse sense of test.
	(initialization): Initialize it to zero.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Add future regression test for header/footer
	mishandling that wasn't already covered (not a live bug; was
	exposed by attempted refactoring).

	* tmac/tests/andoc_check-an-to-doc-transition.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man, mdoc]: Trivially refactor.

	* tmac/an.tmac (an-start-new-document): Rename this...
	(an*break-page-with-new-number): ...to reflect its reduced
	responsibility.

	* tmac/mdoc/doc-common (doc-start-new-document): Rename this...
	(doc-break-page-with-new-number): ...to reflect its reduced
	responsibility.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man, mdoc]: Refactor to separate page number management from
	header trap management.

	* tmac/an.tmac (an-start-new-document): Stop removing
	`an-header` trap.
	(TH): Clear the trap here even if not continuously rendering,
	and call `an-start-new-document`.

	* tmac/mdoc/doc-common (doc-start-new-document): Stop removing
	`doc-header` trap.
	(Dd): Clear the trap here even if not continuously rendering,
	and call `doc-start-new-document`.

2022-12-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common: Refactor for better parallelism with our
	man(7) implementation and to prepare for a synchronized change
	to both.
	(Dd): Move open-coded (inlined) operations from here...
	(doc-start-new-document): ...to this new macro.
	(doc-end-macro): Drop unnecessary register assignment.  `Dd`
	takes care of it if there is a subsequent mdoc(7) document.

2022-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix off-by-one error in generated diagnostic message.

	* src/preproc/tbl/table.cpp: Define new preprocessor macro,
	`PREVIOUS_PAGE_REG`.
	(table::init_output): Compute value for register named using
	`PREVIOUS_PAGE_REG`, use it in diagnostic, and then remove it.
	Also fix verb tense in message.

2022-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Expose the fact of a table's boxedness via a troff
	register so that macro packages can make more intelligent
	decisions about space requirements (since box borders occupy
	significant space on nroff devices).

	* src/preproc/tbl/table.cpp: Define new preprocessor macro,
	`IS_BOXED_REG`.
	(table::do_top): Initialize "boxedness" register.

2022-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (TH): Clarify computation and diagnostic message.

2022-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix Savannah #61878.

	* src/preproc/tbl/table.cpp: Define new preprocessor macro,
	`STARTING_PAGE_REG`.
	(table::define_bottom_macro): Have the formatter issue a warning
	if an unkept, boxed table ends on a different page than it
	began.
	(table::do_top): Save current page number when table begins.

	Fixes <https://savannah.gnu.org/bugs/?61878>.

2022-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #61878.

	* src/preproc/tbl/tests/\
	warn-on-long-boxed-unkept-table.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-12-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp: Write comments to generated output;
	these correspond to functions in this file and to major
	operations of table construction.
	(init_output, compute_widths, define_bottom_macro, do_row)
	(do_top, do_bottom): Do it.

2022-12-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Trivially refactor.  Rename class `constant_int_reg` to
	`readonly_register`.  Say "readonly" instead of "const" to
	try to avoid confusion with C++ constness.  Drop "int" because
	integer-valued registers are the norm, not the exception.

	* src/roff/troff/column.cpp (init_column_requests):
	* src/roff/troff/div.cpp (init_div_requests):
	* src/roff/troff/input.cpp (top level, init_input_requests):
	* src/roff/troff/node.cpp (init_node_requests):
	* src/roff/troff/reg.h: Do it.

2022-12-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Trivially refactor.  Rename class `constant_reg` to
	`readonly_text_register`.  Say "readonly" instead of "const" to
	try to avoid confusion with C++ constness.  Say "text" because
	this class is _mostly_ used for interpolation of string-valued
	registers like the version registers `.x`, `.y` and `.Y`.
	Nevertheless there are some abuses (apparently because the
	constructors for register classes don't accept integer
	parameters for initialization--why?).

	* src/roff/troff/input.cpp (top level)
	(readonly_text_register::readonly_text_register)
	(readonly_text_register::get_string)
	(main, init_registers, init_requests): Do it.

2022-12-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Trivially refactor.  Rename `number_reg_dictionary` to
	`register_dictionary`.  It's shorter _and_ non-abbreviated _and_
	matches our documentation.

	* src/roff/troff/column.cpp (init_column_requests):
	* src/roff/troff/div.cpp (page_number, init_div_requests):
	* src/roff/troff/env.cpp (print_env, init_env_requests)
	(init_hyphen_requests):
	* src/roff/troff/input.cpp (length_request)
	(interpolate_number_format, do_register, do_if_request, main)
	(init_registers, init_input_requests):
	* src/roff/troff/node.cpp (get_register, init_node_requests):
	* src/roff/troff/reg.cpp (top level, define_number_reg)
	(inline_define_reg, alter_format, remove_reg, alias_reg)
	(rename_reg, print_number_regs):
	* src/roff/troff/reg.h: Do it.

2022-12-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add regression test.

	* tmac/tests/an_link-trailing-text-hugs-previous.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/fallbacks.tmac: Really use troff-mode fallbacks only on
	typesetting devices; because this macro file is loaded so early,
	we cannot rely on ".if t".  Thanks to Dave Kemper for the
	discussion in Savannah #63354.

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Use more mnemonic register names, thanks to
	the recent freeing up of some name space.
	- mJ -> mH: saved automatic hyphenation mode
	- mX -> mE: formatting in EX/EE context (Boolean)

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdf.tmac: Drop deletion of unused string `PDFHREF.TEXT`.

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (an-end, AT, UC, DT, PD, SH, IP, BI, BR, IB, IR)
	(RB, RI, OP, an*end-hyperlink, MR): Refactor; "nop"ify macros
	that produce formatted output or call other macros using string
	interpolations--except where we can't: see Savannah #63470.

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (R): Drop macro definition, which implements a
	hack for people who try to use "R" as a font style macro.  This
	doesn't seem to happen much in actual practice (though perhaps
	the diagnostic this hack produces is responsible for suppression
	of the mistake).  Retaining it interferes with the
	"nop"-ification of this macro file.
	* NEWS: Add item.

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Use truly traditional hyphenation mode on
	non-groff-compatible formatters.

2022-12-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Update test coverage and expectations.

	* tmac/tests/an_ME-punct-hyphenates.sh: Test both "an.tmac" and
	"an-ext.tmac" implementations of `ME`.
	* tmac/tests/an_UE-punct-hyphenates.sh: Test both "an.tmac" and
	"an-ext.tmac" implementations of `UE`.
	* tmac/tests/an_UE-breaks-before-long-URIs.sh: Update test
	expectations.  I appear to have inadvertently fixed some
	inelegant rendering.

2022-12-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Rename to reflect code reorganization.

	* tmac/tests/an-ext_ME-punct-hyphenates.sh:
	* tmac/tests/an-ext_MT-body-hyphenates.sh:
	* tmac/tests/an-ext_UE-breaks-before-long-URIs.sh:
	* tmac/tests/an-ext_UE-punct-hyphenates.sh:
	* tmac/tests/an-ext_UR-body-hyphenates.sh: Rename these...
	* tmac/tests/an_ME-punct-hyphenates.sh:
	* tmac/tests/an_MT-body-hyphenates.sh:
	* tmac/tests/an_UE-breaks-before-long-URIs.sh:
	* tmac/tests/an_UE-punct-hyphenates.sh:
	* tmac/tests/an_UR-body-hyphenates.sh: ...to these.

	* tmac/tmac.am (tmac_TESTS): Reflect renames.

2022-12-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Remove groff-feature-dependent code for
	hyperlink management, greatly reducing the size of the file,
	which we permissively license and encourage people to copy
	around.  Drop register definitions corresponding to
	groff-specific output device names.  Drop definition and use of
	`mL` and `mR` strings for angle brackets; no observable change
	on non-groff formatters.  Recognize `mG` register to enable
	testing of these macros even if the formatter is groff.
	(mV): Radically simplify.  This internal "back-end" for `MT` and
	`UR` now just stores its argument in a string, `m1`.
	(mQ): Radically simplify.  This internal "back-end" for `ME` and
	`UE` now just disables automatic hyphenation, formats the saved
	`m1` string between angle brackets, suffixes it with the
	optional argument, and restores automatic hyphenation.
	(UR, MT): Call `mV` with one argument, not nine.
	(UE, ME): Call `mQ` with one argument, not nine.

	* tmac/tests/an-ext_MR-works.sh: Add test of this file's
	simplified `MR` implementation.
	* tmac/tests/an-ext_MT-works.sh:
	* tmac/tests/an-ext_UR-works.sh: Move tests of groff-specific
	hyperlink output from here...
	* tmac/tests/an_MT-works.sh:
	* tmac/tests/an_UR-works.sh: ...to these new files.
	* tmac/tests/an_MR-works.sh:
	* tmac/tests/an_MT-works.sh:
	* tmac/tests/an_UR-works.sh: Add tests for valid HTML formatting
	of hyperlinks, which experience shows is a bit fragile in the
	face of diversion manipulation and output line continuation.

	* tmac/tmac.am (tmac_TESTS): Run new tests.

2022-12-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Support `mG` register: clear it to force the
	loading of this file's macros even if they have an
	implementation in tmac/an.tmac and the formatter claims groff
	compatibility.  This is to ease these macros' testing under
	groff and keep the implementations here simple.
	* tmac/an.tmac: Initialize `mG` register to 1 if not set on
	command line.

2022-12-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Initialize `mX` register.

2022-12-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Define `mC` string (constant-width typeface
	used by `EX`/`EE` macros) as `R` in nroff mode.  Thanks to
	Russ Allbery for prompting me to think more about the
	limitations of Solaris troff.  Implementations do varying
	things with the "previous" font restored by `\fP` or an
	unargumented `.ft` if a requested font is not found.

2022-11-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix Savannah #63449.

	* src/preproc/tbl/table.h (class table): Add new enumeration
	constants for use with `flags` member variable: `HAS_TOP_VLINE`
	and `HAS_TOP_HLINE`, which track properties of the table.
	Unlike others, these have no correspondence to table region
	options.
	* src/preproc/tbl/main.cpp (process_format): Add new local
	Boolean to track whether we're interpreting a format for the
	first row.  Use this to "or" on the `HAS_TOP_VLINE` or
	`HAS_TOP_HLINE` flags if "|" or [_-] are encountered in the
	first row's format, as appropriate.
	(process_data): "Or" on `HAS_TOP_HLINE` if a single or double
	horizontal line is used as the first row's data.
	* src/preproc/tbl/table.cpp (do_top): On nroff mode devices, add
	one vee of space above the table if we're going to be drawing an
	unintersected vertical rule above the table's top.

	Fixes <https://savannah.gnu.org/bugs/?63449>.

2022-11-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #63449.

	* src/preproc/tbl/tests/\
	do-not-overdraw-page-top-in-nroff-mode.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-11-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (struct input_entry_format)
	(input_entry_format::input_entry_format)
	free_input_entry_format_list, process_format): Trivially
	refactor.  Rename `pre_vline` to `vline_count`.

2022-11-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp
	(vertical_rule::contribute_to_bottom_macro, table::print)
	(table::init_output, table::divide_span)
	(table::compute_expand_width, table::define_bottom_macro)
	(table::do_bottom): Produce roff output that is more readable,
	for maintainability.  Indent control lines inside macro
	definitions.  Standardize form of `if`, `ie`, and `el` requests.
	Some output will not be indented because it is produced within
	narrowly-scoped C++ functions (set_troff_location,
	table::print_single_hline, table::print_double_hline,
	table::do_row), I haven't verified that each one is called from
	a consistent troff indentation level, and I'm not sure it's a
	win to parameterize those functions in the indentation level.

2022-11-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix Savannah #61909.

	* src/preproc/tbl/table.cpp (SAVED_INTER_WORD_SPACE_SIZE)
	(SAVED_INTER_SENTENCE_SPACE_SIZE): Add new preprocessor macros.
	(block_entry::do_divert): Restore saved inter-word and
	inter-sentence space when formatting a text entry.
	(table::init_output): When a table region begions, save the
	values of inter-word and inter-sentence space.  Add request to
	the reset macro to restore saved inter-word and inter-sentence
	space when leaving table region.
	(table::do_top): Set inter-sentence space to be equal to
	inter-word space.  This way spaces are "literal" in ordinary
	table extries (but not text blocks).

	Fixes <https://savannah.gnu.org/bugs/?61909>.

2022-11-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #61909.

	* src/preproc/tbl/tests/\
	save-and-restore-inter-sentence-space.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-11-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Suppress line numbering when formatting tables, and
	restore it afterward.

	* src/preproc/tbl/table.cpp: Revert much of commit b69062693's
	{2011-07-20} changes to this file.  They were too complex for me
	to understand, and permitted Savannah #60140 to persist (or
	caused it).
	(ROW_START_LINE_REG, ROW_SAVE_LINE_REG, ROW_MAX_LINE_REG)
	(REPEATED_NM_SET_MACRO, REPEATED_NM_SUS_MACRO): Drop
	preprocessor macros.
	(SAVED_NUMBERING_LINENO, SAVED_NUMBERING_SUPPRESSION_COUNT): Add
	new preprocessor macros.
	(table::init_output, table::print_single_hline)
	(table::print_double_hline, table::define_bottom_macro)
	(table::do_row, table::do_top, table::do_bottom): Drop old
	logic.

	(table::init_output): When the table begins, save the current
	line number register `ln` and the count of remaining lines to be
	suppressed (the new `.nn` register).  Then suppress numbering
	for the next 2 billion+ lines of output, with a groveling
	apology to the elegance police.
	(table::do_bottom): Restore saved value of `.nn`.  If numbering
	was active (even if suppressed), restore it with `nm` request.
	If it wasn't, disable it, in case it was turned on inside the
	table region.

	Fixes <https://savannah.gnu.org/bugs/?60140>.  Thanks to Hans
	Bezemer for noting the practical significance of this bug.

2022-11-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #60140.

	* src/preproc/tbl/tests/save-and-restore-line-numbering.sh: Do
	it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-11-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Implement new `.nn` register to report the remaining
	count of lines to have their numbering suppressed.

	* src/roff/troff/env.h (class environment): Declare new member
	function `get_no_number_count()`.
	* src/roff/troff/env.cpp (get_no_number_count): Define new
	member function, returning value of member variable
	`no_number_count`.
	(init_env_requests): Define new ".nn" register and attach it to
	`get_no_number_count()`.

	* doc/groff.texi (Miscellaneous): Document it.  Include example
	of use to determine whether current output line will be
	numbered.  Also clarify meaning of register; `.nn` is not
	decremented except when output line numbering is enabled.
	* man/groff.7.man (Read-only registers): Document it.

	* src/roff/groff/tests/dot-nn_register_works.sh: Test it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	* NEWS: Add item.

	See <https://lists.gnu.org/archive/html/groff/2022-11/\
	msg00153.html>.

2022-11-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/fallbacks.tmac: Comment out four of the fallback
	character definitions for (preconv'd) Unicode character input
	added to address Savannah #58930 (corresponding to \[dg], \[dd],
	\[%0], and \[rn]; they are failing for not yet understood
	reasons involving "macros" attached to groff character info
	structs, and the semantics of what it means for a character to
	"exist" per the 'c' conditional operator.  Fixes regression when
	using "tty-char.tmac" (which nroff loads by default).  Problem
	introduced by me in commit 132182bd71, 23 October.  The hope is
	to resolve this issue post-groff 1.23.0.  Thanks to Dave Kemper
	for the report and discussion in Savannah #63332.

2022-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (SY, YS, mV): Remove `mA`, `mI`, and `mT`
	registers when done with them.

2022-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/node.h (character_exists):
	* src/roff/troff/node.cpp (character_exists): Boolify.

2022-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[doc]: Add make(1) dependency.

	* doc/doc.am (doc/groff-man-pages.pdf): Add dependency on our
	FreeEuro font since we embed it.

2022-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Refactor generation of "freeeuro.pfa" to make more
	economical use of existing infrastructure, per a suggestion from
	Deri James.  This also puts the file where gropdf's "download"
	file can find it when running it in a separate build directory.
	We use it to generate "groff-man-pages.pdf".

	* font/devps/freeeuro.pfa: Rename this...
	* font/devps/freeeuro.ps: ...to this.  We can now use the suffix
	rule that also applies to "symbolsl.ps" and "zapfdr.ps".

	* font/devps/devps.am (DEVPSFONTFILES): Move "freeeuro.pfa" from
	here...
	(DEVPSFONTFILES_GENERATED): ...to here.
	(EXTRA_DIST): Ship the "new" "freeeuro.ps" file.

2022-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devps/psstrip.sed: Stop stripping comment lines in
	general instead of preserving only ones that use the form in the
	Document Structuring Conventions.  This way we won't strip
	copyright notices, like Werner Lemberg's in the FreeEuro font.
	Thanks to Deri James for pointing this out.

2022-11-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	tmac/an-ext.tmac: Refactor to reduce code size.

	* tmac/an-ext.tmac: Refactor to reduce code size.  `UE` and `ME`
	have nearly identical implementations so...

	(mQ): Define new macro to perform the requisite actions, and...

	(UE, ME): Make these into wrappers calling mQ.

2022-11-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add unit tests for `MT/ME` and `UR/UE`.

	* tmac/tests/an-ext_MT-works.sh:
	* tmac/tests/an-ext_UR-works.sh: Do it.

	* tmac/tmac.am (tmac_TESTS): Run tests.

2022-11-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl: Throw warning if paper format is
	unrecognized.

2022-11-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (Msg): Align more closely with
	diagnostic message format prescribed by GNU Coding Standards:
	emit space (only) prior to message severity.

2022-11-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/meref.me.in: Drop unnecessary initialization parameters
	from document.  The line and title length do not need to be set
	in troff mode; the document lays out fine for a variety of paper
	formats if these are not forced to 6.5 inches.  Also drop
	redundant initialization of `pp` register.

2022-11-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Fix Savannah #63377.

	* tmac/doc.tmac (Nm): Properly leverage new
	`doc-in-name-section` variable.  Set page topic `doc-topic-name`
	to the first encountered argumentful `Nm` call in the "Name"
	section while handling other "Name" section concerns, instead of
	later after deciding we're not in the "Synopsis" section.
	Problem caused by me when fixing antediluvian mdoc bug in commit
	0d85615c62, 5 November.

	Fixes <https://savannah.gnu.org/bugs/?63377>.  Thanks to John
	Gardner for the report.

2022-11-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Add tests for `Nm` macro.

	* tmac/tests/doc_Nm-works.sh: Do it.  Test regression reported
	in Savannah #63377.  Also ensure that we handle the case where
	multiple `Nm` items are declared in the "Name" section (as might
	happen in library man pages).
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-11-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/papersize.tmac: Improve integration with mm(7) macro
	package.  If a paper format has been selected, set `W` register
	to new line length (if not already set on command line).
	Similarly, set `O` register to 1 inch for the symmetric
	horizontal margins otherwise assumed by this macro file.  This
	means that "groff -mm" and "groff -dpaper=letter -mm" are _not_
	synonymous (when groff is configured to use U.S. letter as the
	default paper format), because groff mm(7) uses a page offset of
	0.963 inches on typesetters for compatibility with DWB mm.
	* NEWS: Add item.

	See discussion in <https://lists.gnu.org/archive/html/\
	groff/2022-11/msg00081.html> and (some) follow-ups.

2022-11-16  Deri James  <deri@chuzzlewit.myzen.co.uk>

	* src/devices/gropdf/gropdf.pl: If the argument to the paper
	format option '-p' matches a recognized format but includes a
	trailing 'L' or 'l' ("legalL" or "a4l", for example), rotate the
	document's MediaBox.

2022-11-16  Deri James  <deri@chuzzlewit.myzen.co.uk>

	* src/devices/gropdf/gropdf.pl: Fix incorrect hotspot placement
	if page is in landscape orientation.
	(FixRect): Perform coordinate transform if page is rotated.
	(Rotate): New function performs relevant trigonometry.

	Fixes <https://savannah.gnu.org/bugs/?63380>.  Thanks to Blake
	McBride for the report.

2022-11-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Integrate better with papersize.tmac by no longer
	forcing line (and title) length to 6 inches for typesetters on
	initialization.  Gather default line length from output device
	description, possibly modified later (by other macro file or
	input).  No change to terminal ("nroff mode") output.
	* NEWS: Add item.

2022-11-16  Peter Schaffter <peter@schaffter.ca>

	* tmac/papersize.tmac: If a paper format has been selected,
	smuggle right margin setting to mom(7) if not overridden by the
	user.  See discussion in <https://lists.gnu.org/archive/html/\
	groff/2022-11/msg00081.html> and (some) follow-ups.

2022-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/groff-man-pages.pdf)
	(doc/groff-man-pages.utf8.txt): Add dependencies on new
	`TMAC_PACKAGE_MAN` and `TMAC_PACKAGE_MDOC` convenience macros.

2022-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am (TMAC_PACKAGE_MAN, TMAC_PACKAGE_MDOC): Define
	convenience macros for in-tree documents to depend on.

2022-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Trivially refactor.  Rename `an-section` to
	`an*section`.

2022-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grolbp/lbp.cpp (usage): Tweak usage message.  The
	output driver should be perfectly capable of handling output
	from non-GNU (but device-independent) troffs.

2022-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/ps.cpp (usage): Employ more informative
	metasyntactic variable names in usage message.  Also summarize
	program's function and direct reader to man page if help
	explicitly requested (inferred from identity of output stream).

2022-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Trivially refactor for congruence with
	documentary terminology.  Rename strings and macros.
	- an-title                 -> an*topic
	- an-abbreviate-page-title -> an*abbreviate-page-topic
	- an-title-abbv            -> an*topic-abbv
	- an-title-string          -> an*topic-string
	- an-title-length          -> an*topic-length
	- an-title-length-prev     -> an*topic-length-prev
	- an-title-new-length      -> an*topic-new-length
	- an-page-title-style      -> an*topic-style
	(TH): Recast diagnostic message to refer to "section", not
	"volume" title.

2022-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Refactor to reduce code size.  `UR` and `MT`
	have identical implementations so...
	(mV): Define new macro to perform the requisite actions, and...
	(UR, MT): Make these into wrappers calling mV.

2022-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (UR, MT): Fix problem with incorrect line
	lengths and occasional "can't adjust" warnings when using
	hyperlinks.  Reduce the line length within the diversion by the
	amount of indentation used in the context.  Without this, lines
	were getting set too short.  (You might think they'd be too
	long, but when creating a new environment, the _formatter's_
	default line length is used; that's 65n on terminal devices.)

2022-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add test to ensure that link text (when the hyperlink
	itself is not formatted because the device supports
	hyperlinking) uses the correct line length and is adjusted.

	* tmac/tests/an_adjust-link-text-correctly.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run tests.

2022-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am: Refactor.
	(MOSTLYCLEANFILES): Populate macro incrementally, adjacent to
	the targets that build the files to be cleaned.  This will
	enable cleaner refactoring in the future.
	(DEFAULT_BASE35_FONTS): Add new macro storing the targets of the
	PostScript Level 2 standard base 35 font descriptions.
	(devpdffont_DATA): Populate using `DEFAULT_BASE35_FONTS`.
	(URW_BASE35_FONTS): Add new macro, empty if [!HAVE_URW_FONTS];
	and [HAVE_URW_FONTS] otherwise naming the `U` foundry font
	description counterparts of the `DEFAULT_BASE35_FONTS`.
	(devpdffont_DATA): Append `URW_BASE35_FONTS`.
	($(DEFAULT_BASE35_FONTS) $(URW_BASE35_FONTS)): Assert dependency
	on "font/devpdf/download".  This isn't literally true, but
	BuildFoundries generates all of these together, so if the
	"font/devpdf/download" target rule runs successfully, the font
	description files named in these macro expansions will be
	generated too.

2022-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Add new command-line option to
	specify the generated font description's "spacewidth" parameter;
	in commit bf7f6862c3, 2021-09-24, I made libgroff complain if
	this directive is missing (since any font, even a "special" one,
	can be selected as current and the formatter's behavior when
	encountering an input space should be well-defined under that
	circumstance).  Adding this option enables a well-formed font
	description to be produced.
	* src/utils/afmtodit/afmtodit.pl (usage):
	* src/utils/afmtodit/afmtodit.1.man (Synopsis, Options):
	Document it.
	* NEWS: Add item.

2022-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Use our own fatal exit
	function instead of Perl's "die".
	(croak): New subroutine emits argument as part of diagnostic
	message and exits with status 1.
	(usage): Exit with status 2, not 1, on usage errors.

	* NEWS: Document new exit behavior.

2022-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am (font/devpdf/download): Improve
	comprehensibility of comments in generated "download" file.
	Stop bracketing path element separator with spaces.

2022-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl (LoadFoundry): Stop
	capitalizing beginning of diagnostic message (per GNU Coding
	Standards).  Drop ellipsis from end since no further diagnostics
	relevant to that message are expected.  Trim trailing slashes
	from font path elements.

2022-11-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devps/devps.am: Refactor.  Turn two identical target
	rules into a (BSD-make-style, old-fashioned) pattern rule.

2022-11-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Rechristen self "GNU roff".

2022-11-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/pic/pic.ypp: Slightly refactor.  Rename parameter
	`form` (format) to `fmt` to make its nature as an abbreviation
	clear.
	(format_number, do_sprintf): Reorder null pointer equality
	comparisons to avoid inadvertent lvalue assignment.
	(do_sprintf): Declare lists of valid format conversion
	specifiers and modifiers explicitly instead of as happenstance
	literals.  Recast diagnostic messages to refer to "invalid", not
	"bad" input; refer to input keyword correctly as "sprintf" (not
	"snprintf"); and report the identity of the invalid conversion
	specifier we reject.

2022-11-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac (Fl, doc-flag-recursion, doc-print-recursive)
	(doc-print-prefixes, Ar, Nm, Pa, Xr, doc-do-func, Fn)
	(doc-do-func-args, Fo): Remove now-relic resets of type size to
	previous value.  Since commit 5125754cdf, 23 February, no mdoc
	macro ever changes the type size.

2022-11-08  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Cater for invalid entries in download file.

	* src/devices/gropdf/gropdf.pl: Test if path in the "download"
	file points to a readable file.  Also change order so that the
	first valid entry is used as the font to embed.  This replaces
	previous order where last found entry is used.

	Fixes <https://savannah.gnu.org/bugs/?62950>.

2022-11-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Set page topic in roman in "Name" section.

	* tmac/doc.tmac (Nm): If in the "Name" section of the page, set
	argument(s) with the `No` (normal formatting) macro instead of
	handling them...normally.  Since `Nm`'s usual behavior is to set
	the next argument in boldface, in this circumstance it is set in
	roman.  Aligns page rendering with man(7) and fixes a bug
	documented in the 4.3BSD-Reno mdoc.samples(7) page (1990-06-22),
	upon which the groff_mdoc(7) page is based.
	* tmac/groff_mdoc.7.man (Bugs): De-document bug.

	Fixes part of <https://savannah.gnu.org/bugs/?62926>.

2022-11-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common: Add internal register
	`doc-in-name-section` to keep track of whether a macro is called
	within the "Name" section of the document, to prepare a means of
	fixing a long-standing bug with `Nm`.
	(Sh): Canonicalize capitalization of section heading sooner.
	Set or clear `doc-in-name-section` based on result.
	(Rd): Add new register to dump.
	* tmac/doc.tmac (doc-save-global-vars, doc-restore-global-vars):
	Handle new register.

2022-11-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Use font CR, not CB, for `Cm` ("command modifier") and
	`Fl` ("flag") macros on typesetters.

	* tmac/mdoc/doc-ditroff (doc-Cm-font, doc-Fl-Font): Switch to
	Courier roman from Courier bold.  This congrues better with
	other `Li` literals, which were not in boldface.

2022-11-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-nroff (doc-Li-Font): Switch from roman to bold.
	On typesetters, the use of Courier (roman) plainly distinguishes
	unquoted literals from their context.  On terminals there was no
	such visible distinction.  Fortunately, in groff_mdoc(7) itself,
	this does not result in a blinding blitz of boldface because the
	`Ql` (quoted literal) macro is so often used, and it maintains
	the roman style.  This change further aligns groff mdoc(7) with
	groff man(7) style conventions.  (Also see how we handle
	literals for typesetters and terminals in the "ms.ms" document.)

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Make `Sx` macro perform quotation, not italicization.
	It's thorougly inconsistent with English composition practices
	to refer to (sub)section headings within a document as if they
	were major works.

	* tmac/doc.tmac (Sx): Implement.
	* tmac/mdoc/doc-ditroff (doc-Sx-font):
	* tmac/mdoc/doc-nroff (doc-Sx-font): Delete.
	* tmac/groff_mdoc.7.man (Section Cross References): Rename...
	((Sub)section cross references): ...to this.  Recognize
	existence of `Ss` macro, curiously overlooked before.
	* NEWS: Add item.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Drop now-unused `doc-pageref` string.  It was nowhere
	interpolated outside of state management macros.

	* tmac/doc.tmac (doc-save-global-vars, doc-restore-global-vars):
	* tmac/mdoc/doc-common: Do it.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (doc-header, doc-footer): Revise for
	clarity and to use correct typefaces for titles.
	(doc-header): Add new strings to ease title construction.
	`doc-xref` stores the fully formatted page topic and section
	number, e.g., "troff(1)"; `doc-abbv` stores the its potentially
	abbreviated form when it is too long to fit.
	(doc-footer): Use `doc-xref` as above.  Stop setting the `Os`
	and `Dd` parameters in the ("semantic"?) font used for the
	page's section number (probably unnoticed all these years
	because the font used to render that was (Times) roman).

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac:
	* tmac/mdoc/doc-common: Rename strings for clarity.
	- doc-document-title -> doc-page-topic
	- doc-document-title-saved -> doc-page-topic-saved
	* tmac/mdoc/doc-common: Use new name.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff (doc-page-topic-font):
	* tmac/mdoc/doc-nroff (doc-page-topic-font): Set man page topic
	names in italics.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Rename strings for clarity.
	- doc-caption-font -> doc-page-topic-font
	- doc-caption-font2 -> doc-page-section-font
	* tmac/mdoc/doc-common (doc-header, doc-footer): Use new names.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac: Delete suppression of `Pa` font selection in a
	"Files" section.  This special handling was not documented.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff (doc-Pa-font): Set file specifications
	in italics on typesetters.  (Terminals already use italics.)

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff (doc-Xr-font):
	* tmac/mdoc/doc-nroff (doc-Xr-font): Set man page topic cross
	references in italics.

2022-11-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Rename `doc-Tn-font-shape` to
	`doc-Tn-font` for better parallelism with other font selection
	strings for mdoc macros, since the `Tn` macro no longer
	manipulates the type size.
	* tmac/doc.tmac (Tn): Use new name.

2022-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Debugging): Fix misleading claim.  The
	arguments to the `tm`, `tmc`, and `tm1` requests are not read in
	copy mode.  For example, you don't need to double backslashes to
	get them to interpolate registers or strings.

2022-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (an-end):
	* tmac/mdoc/doc-common (doc-end-macro): Ensure that document
	footer appears in continuous rendering mode even when a final
	pending output line in the document is 1v from the page bottom.
	Replace `fl` call with `br`, which IMO has clearer semantics.
	Extend page length by 1v before doing so if the current vertical
	position is within 1v of the page bottom.

	Thanks to Alex Colomar for the report.

2022-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man, mdoc]: Regression-test special case of continuous
	rendering when the last pending output line in the document is
	1v from the (notional) page bottom.

	* tmac/tests/an_output-footer-when-continuously-rendering.sh:
	* tmac/tests/doc_output-footer-when-continuously-rendering.sh:
	Do it.
	* tmac/tmac.am (tmac_TESTS): Run tests.

2022-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TE): Update diagnostic to mention another
	failure mode: a man page that is simply a `so` request requires
	soelim(1) to be run if the sourced page uses tbl(1).

2022-11-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/xditview/xditview.am
	($(GXDITVIEW_GROFF_VERSION_H)): Run `$(MKDIR_P)` and `printf` as
	separate rule commands in order to use them with `$(AM_V_at)`
	and `$(AM_V_GEN)`, respectively.  Prevents noise from build.

	Fixes <https://savannah.gnu.org/bugs/?63302>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[eqn]: Fix Savannah #63299.

	* src/preproc/eqn/main.cpp: Revise input file line number
	handling.
	(read_line): Stop dealing with `current_lineno` here; it's now
	up to its caller (`do_file()`) to manipulate the line number.
	(do_file): When reading new file, initialize `current_lineno` to
	1 instead of 0.  Reset it to zero when encountering EOF (so that
	diagnostics will not include a line number at all).  When
	performing nested call to `read_line()` to gather '.EN' from
	input, increment the line number.  Write correct line number in
	output groff `lf` requests; in groff, its first argument assigns
	the number of the _next_ input line.  Increment line number at
	end of outer `read_line()` loop.

	Fixes <https://savannah.gnu.org/bugs/?63299>.  Thanks to Alex
	Colomar for the report.

2022-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[eqn]: Regression-test Savannah #63299.

	* src/preproc/eqn/tests/\
	diagnostics-report-correct-line-numbers.sh: Do it.
	* src/preproc/eqn/eqn.am (eqn_TESTS, TESTS, EXTRA_DIST): Run
	test.

2022-10-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (fail, warn, construct_command)
	(version): Restore trailing newlines to `print`ed output.  They
	went missing when I removed the assignment of the output record
	separator in commit 6f2e367836, 24 October.  Thanks to Dave
	Kemper for catching this.

2022-10-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.cpp: Trivially refactor.  Rename
	`default_encoding` to `fallback_encoding` for clarity.  Update
	comments and debugging diagnostic messages accordingly.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grolj4]: Absorb lj4_font(5) man page into grolj4(1).

	* src/devices/grolj4/lj4_font.5.man: Delete, moving content...
	* src/devices/grolj4/grolj4.1.man (Fonts): ...hither.

	* doc/doc.am (GROFF_MAN_PAGES1):
	* src/devices/grolj4/grolj4.am (man5_MANS, EXTRA_DIST): Stop
	formatting and shipping removed page.

	* src/roff/groff/groff.1.man:
	* src/utils/hpftodit/hpftodit.1.man: Drop references to page.

	Fixes <https://savannah.gnu.org/bugs/?61819>.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `SN` register to configure subsection heading
	indentation.

	* tmac/doc.tmac: Recognize `SN` register if set on command line
	and use groff man(7)-compatible default if it is not.
	* tmac/mdoc/doc-common (Ss): Use this register instead of a
	literal.
	* tmac/groff_mdoc.7.man (Formatting with groff, troff, and
	nroff): Document it.
	* NEWS: Update item.

	Fixes part of <https://savannah.gnu.org/bugs/?62926>.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `IN` register to configure paragraph
	indentation.

	* tmac/doc.tmac: Recognize `IN` register if set on command line
	and use groff man(7)-compatible defaults if it is not.
	* tmac/mdoc/doc-common (Sh): Use this register instead of
	`doc-paragraph-indentation`.
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Stop setting pargraph indentation
	defaults here.
	* tmac/groff_mdoc.7.man (Formatting with groff, troff, and
	nroff): Document it.
	* NEWS: Update item.

	* tmac/tests/doc_Mt-works.sh:
	* tmac/tests/doc_indents-correctly.sh: Update test expectations.

	Fixes part of <https://savannah.gnu.org/bugs/?62926>.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (Sh): Fix code style nit.  Set paragraph
	indentation absolutely rather than incrementally.  mdoc(7)
	doesn't have relative inset macros like man(7)'s `RS`/`RE`, so
	the relative measurement could mislead the reader.  (The
	section heading itself uses an indentation of 0.)

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Fix Debian #1022179.

	* tmac/mdoc/doc-common (Ss): Indent entire subsection heading by
	3 ens, even if it breaks across output lines.  (Change and
	restore indentation explicitly instead of using a temporary
	indent to achieve this.  Also indent absolutely by 3n instead of
	retreating by one quarter inch.)

	Fixes <https://bugs.debian.org/1022179>.  Thanks to наб for the
	report.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/doc_indents-correctly.sh: Add regression test for
	Debian #1022179.

	* tmac/tmac.am (tmac_TESTS): Run test.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Fix misleading register name.

	* tmac/mdoc/doc-common (Sh):
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Rename `doc-subheader-indent` to
	`doc-paragraph-indentation`, because the latter is what it's
	used for.

2022-10-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_POPPLER): Improve shell code portability.
	Per the GNU Autoconf manual, "The -a, -o, '(', and ')' operands
	are not present in all implementations, and have been marked
	obsolete by Posix 2008.  ...portable uses of test should never
	have more than four arguments, and scripts should use shell
	constructs like '&&' and '||' instead."

2022-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.cpp: Alter usage message handling.
	(usage): Summarize purpose of program and steer reader to man
	page (only) if help was explicitly requested, and exit
	successfully from here...
	(main): ...instead of calling scope.

2022-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.cpp (usage): Use more
	communicative metasyntactic variable names.
	* src/preproc/preconv/preconv.1.man (Synopsis, Options): Align
	with updated usage message.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp: Alter usage message handling.
	(usage): Summarize purpose of program and steer reader to man
	page (only) if help was explicitly requested, and exit
	successfully from here...
	(main): ...instead of calling scope.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grolbp/lbp.cpp: Alter usage message handling.
	(usage): Summarize purpose of program and steer reader to man
	page (only) if help was explicitly requested, and exit
	successfully from here...
	(main): ...instead of calling scope.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grolbp/lbp.cpp (main): Handle `getopt_long()`
	return value more idiomatically.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grolbp/lbp.cpp: Fix code style nits.
	(main): Use standard C library symbols `EXIT_SUCCESS` and
	`EXIT_FAILURE` instead of integer literals as arguments to
	`exit()`.  Add assertion.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tty.cpp: Alter usage message handling.
	(usage): Summarize purpose of program and steer reader to man
	page (only) if help was explicitly requested, and exit
	successfully from here...
	(main): ...instead of calling scope.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tty.cpp: Fix code style nits.
	(main): Use standard C library symbols `EXIT_SUCCESS` and
	`EXIT_FAILURE` instead of integer literals as arguments to
	`exit()`.  Replace `assert(0)` call with communicative
	predicate.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp: Alter usage message handling.
	(synopsis, help): Coalesce these two functions...
	(usage): ...into this one.  Summarize purpose of program and
	steer reader to man page only if help was explicitly requested,
	rather than blitzing user with text upon a usage error.  Also
	drop option summary from usage message, as it duplicates
	groff(1).

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Alter usage message handling.
	(help): Rename this subroutine...
	(usage): ...to this.  Summarize purpose of program and steer
	reader to man page only if help was explicitly requested, rather
	than blitzing user with text upon a usage error.  Also drop
	option summary from usage message, as it duplicates grog(1).

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Drop relic code and comments.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Migrate expansion of Perl interpreter in shebang.
	Use the same technique as afmtodit, mmroff, gropdf, and pdfmom.

	* src/utils/grog/grog.am (grog): Replace "@PERL@" instead of
	'^\(#! \).*perl'.
	* src/utils/grog/grog.pl: Use "@PERL@" in shebang.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[afmtodit]: Give program a usage message.

	* src/utils/afmtodit/afmtodit.pl: Add new scalar `want_help` of
	Boolean sense.  Recognize new long option `--help`, attached to
	`$want_help`.  Stop stripping off directory name components from
	program name when emitting diagnostics.  No other groff program
	does this (well, gropdf did until recently), and it might save
	users some confusion if they're working with multiple copies of
	afmtodit.
	(usage): New subroutine reports usage message.  If help was
	explicitly requested, summarize purpose of program and steer
	reader to man page.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[afmtodit]: Migrate expansion of Perl interpreter in shebang.
	Use the same technique as mmroff, gropdf, and pdfmom.

	* src/utils/afmtodit/afmtodit.am (afmtodit): Replace "@PERL@"
	instead of "/usr/bin/perl".
	* src/utils/afmtodit/afmtodit.pl: Use "@PERL@" in shebang.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gropdf] Give program a usage message.

	* src/devices/gropdf/gropdf.pl: Add new scalar `want_help` of
	Boolean sense.  Recognize new long option `--help`, attached to
	`$want_help`.
	(usage): New subroutine reports usage message.  If help was
	explicitly requested, summarize purpose of program and steer
	reader to man page.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/xditview/xditview.c (Syntax): "#if 0" out
	reference to `-noPolyText` option, whose effect is likewise
	bracketed in another file.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (enable_warning, disable_warning):
	Recast diagnostic messages for clarity.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pfbtops]: Fix code style and diagnostic nits.

	* src/utils/pfbtops/pfbtops.c (error): Exit with `EXIT_FAILURE`
	status (from standard C library) instead of status 2.
	(main): Exit with `EXIT_SUCCESS` status when writing version or
	help information.  Exit with status 2 when dying due to usage
	error.  Use `fprintf()` and `strerror()` to construct error
	message when dying due to inability to open input file instead
	of using `perror()`, which anonymizes its caller and thus should
	never be used in serious work.  Avoid it like `gets()`.
	* NEWS: Add item for exit status changes.

	Continues the long process of fixing Savannah #52463.

2022-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man pages]: Don't document macro package compatibility wrapper
	directory if it's not used.

	* Makefile.am (.man): Use sed to replace
	'@COMPATIBILITY_WRAPPERS@' in man page text with value of
	`compatibility_wrappers` shell variable.  Document its purpose.
	* src/preproc/eqn/eqn.1.man (Description):
	* src/preproc/grn/grn.1.man (Options):
	* src/roff/groff/groff.1.man (Installation directories):
	* src/roff/troff/troff.1.man (Environment): Mention
	`@SYSTEMMACRODIR@` only if `@COMPATIBILITY_WRAPPERS@` expands to
	something other than "no" (it could be "yes" or "manual").

	Thanks to Alexander Kanavin and Jeremy Puhlman for the report.

2022-10-21  Robert Yang <liezhi.yang@windriver.com>

	* font/devpdf/util/BuildFoundries.pl:
	* src/devices/gropdf/gropdf.pl:
	* src/devices/gropdf/pdfmom.pl: Replace use of '-w' in shebang
	line with "use warnings;".

2022-10-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/fallbacks.tmac: Define fallback characters for many code
	points from the Unicode General Punctuation Block.  This is to
	ease migration from other documentation formats; in many cases
	there are more idiomatic *roff ways of getting results that
	typeset better and are amenable to fine tuning.  For instance,
	Unicode defines spaces and dashes of various discrete widths;
	when typesetting with *roff, you can have a space or dash (among
	other things) of any length achievable by the output device.
	* tmac/ps.tmac: Migrate non-breaking hyphen fallback character
	definition from here to the foregoing.

	Fixes <https://savannah.gnu.org/?58930>.  Thanks to Dave Kemper
	for the report and discussion.

2022-10-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac:
	* tmac/s.tmac: Escape newlines when opening conditional blocks.

	Fixes <https://savannah.gnu.org/?63197>.  Thanks to Bjarni Ingi
	Gislason for the report and Dave Kemper for the quick fix.

2022-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grodvi/dvi.cpp (usage):
	* src/devices/grohtml/post-html.cpp (usage):
	* src/devices/grolbp/lbp.cpp (usage):
	* src/devices/grolj4/lj4.cpp (usage):
	* src/devices/grops/ps.cpp (usage):
	* src/devices/grotty/tty.cpp (usage):
	* src/devices/xditview/xditview.cpp (usage):
	* src/preproc/eqn/main.cpp (usage):
	* src/preproc/grn/main.cpp (usage):
	* src/preproc/html/pre-html.cpp (usage):
	* src/preproc/pic/main.cpp (usage):
	* src/preproc/preconv/preconv.cpp (usage):
	* src/preproc/refer/refer.cpp (usage):
	* src/preproc/soelim/soelim.cpp (usage):
	* src/preproc/tbl/main.cpp (usage):
	* src/roff/groff/groff.cpp (synopsis, help):
	* src/roff/nroff/nroff.sh:
	* src/roff/troff/input.cpp (usage):
	* src/utils/addftinfo/addftinfo.cpp (usage):
	* src/utils/hpftodit/hpftodit.cpp (usage):
	* src/utils/indxbib/indxbib.cpp (usage):
	* src/utils/lkbib/lkbib.cpp (usage):
	* src/utils/lookbib/lookbib.cpp (usage):
	* src/utils/pfbtops/pfbtops.c (usage):
	* src/utils/tfmtodit/tfmtodit.cpp (usage):
	* src/utils/xtotroff/xtotroff.c (usage): Update usage message.
	Present different modes of operation on separate output lines.
	Sort options in English lexicographic order.  Document help
	option(s) as last mode of operation.

2022-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl: Revise handling of argument 0.
	Rename scalar `progname` to `prog` for brevity (and preparation
	for writing a usage message).  Also stop stripping off directory
	name components from it.  No other groff program does this, and
	it might save users some confusion if they're working with
	multiple copies of gropdf.

2022-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	Migrate terminology from "paper size" to "paper format" or
	"paper dimensions" as appropriate in documentation and
	diagnostic messages.  "Format" implies an orientation (which can
	be overridden in many cases) whereas size does not.  When only
	the magnitudes of measurements are at issue (mainly for internal
	purposes), use the term "dimensions".

	* NEWS:
	* PROBLEMS:
	* doc/groff.texi:
	* m4/groff.m4 (GROFF_PAGE):
	* man/groff_font.5.man:
	* man/groff_tmac.5.man:
	* src/devices/grodvi/dvi.cpp (main):
	* src/devices/grolbp/grolbp.1.man:
	* src/devices/grolbp/lbp.cpp (main):
	* src/devices/grolj4/grolj4.1.man:
	* src/devices/grolj4/lj4.cpp (lj4_printer::lj4_printer, main):
	* src/devices/grolj4/lj4_font.5.man:
	* src/devices/gropdf/gropdf.1.man:
	* src/devices/grops/grops.1.man:
	* src/devices/grops/ps.cpp (main):
	* src/roff/groff/groff.1.man:
	* tmac/papersize.tmac: Do it.

2022-10-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff (doc-left-parenthesis)
	(doc-right-parenthesis, doc-left-bracket, doc-right-bracket):
	Drop thin and hair space escape sequences from these string
	definitions.  (Also, doc-right-bracket was inconsistent with
	doc-left-bracket, the former inserting horizontal motion only
	before the bracket character.)  Eliminates excess space when
	using Pq, Po, Pc and Bq, Bo, Bc macros and formatting for
	typesetters, and aligns output with behavior of `Pq` and `Bq` as
	documented in groff_mdoc(7).

	Fixes <https://bugs.debian.org/1021795>.  Thanks to наб for the
	report.

2022-10-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff: Use groff-canonical typeface names in
	font selection escape sequences.  Migrate 'C' to 'CR' and 'CO'
	to 'CI'.  (Admittedly, "Courier oblique" is more pedantically
	correct than "Courier italic".  But the iron ball of Unix troff
	history and its style trio [later quartet] of "R", "I", "B"
	{then "BI"} will not be ignored.)

2022-10-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff: Drop nilpotent type size escape
	sequences from string definitions.

2022-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	Document a CSTR #54 erratum regarding \n(st and \n(sb.

	* doc/groff.texi (Page Motions):
	* man/groff.7.man (Writable registers):
	* man/groff_diff.7.man (New registers): Do it.

	* PROBLEMS: Further clarify.  Note DWB and Heirloom behavior.

2022-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/main.cpp (read_line): Fix switched test
	consequents when updating `current_lineno`.

2022-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/xtotroff/xtotroff.c (main): Annotate "xtotroff" as a
	GNU program in version information.

2022-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/xditview/xditview.am
	($(GXDITVIEW_GROFF_VERSION_H): Perform correct substitution to
	get groff version string into `Version_string` C symbol.
	Continues commit c73decb58f, 9 October.

2022-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.1.man (Files): Fix ordering error.

	Fixes <https://savannah.gnu.org/bugs/?63228>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-10-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/lex.cpp (get_delimited_text): Clear line
	number when hitting EOF.
	* src/preproc/eqn/main.cpp: Revise end-of-file handling.  Clear
	line number upon reaching EOF so that we don't report a nonsense
	value one greater than the number of lines in the input file.
	(read_line): Boolify.  Make static (local linkage only), since
	it has no external callers.  Introduce new Boolean variable
	`is_end_of_file`.  Clear `current_lineno` if EOF, and increment
	it otherwise.
	(do_file, main): Clarify diagnostic messages.

2022-10-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[eqn]: Improve diagnostics involving unprintable characters.

	* src/preproc/eqn/main.cpp (input_char_description): New
	function constructs a human-readable string describing
	characters.
	(read_line, inline_equation, main): Call new function and adjust
	diagnostic message wording to accommodate the phrase it returns.

	Fixes <https://savannah.gnu.org/bugs/?63218>.

2022-10-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[eqn]: Improve diagnostics.

	* src/preproc/eqn/lex.cpp (file_input::~file_input):
	* src/preproc/eqn/main.cpp (main): Die if `fclose()` fails and
	report underlying system error.
	(inline_equation): Identify inline equation context.

2022-10-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (2c, 1c): Throw diagnostic if changing columnation
	with a footnote pending.  This isn't necessarily an error per
	se, but in many cases it will flag an undesirable page layout
	due to the limited flexibility of me(7)'s footnote support at
	present.  See <https://savannah.gnu.org/bugs/?63176>.

2022-10-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/main.cpp: Fix code style nits.
	(usage): Align output with man page.  Document separate
	invocation modes separately.
	(main): Use standard C library symbols `EXIT_SUCCESS` and
	`EXIT_FAILURE` with `exit()` calls instead of integer literals.
	Replace `assert(0)` call with communicative predicate.  Check
	return value of `fclose()`, and exit with fatal error if it
	fails.  Distinguish `ferror()` status and `fflush(stdout)`
	failures when cleaning up before exit.

2022-10-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_color_draw_node): Clarify
	diagnostic.

2022-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/dvi.tmac: Always render \[aq] as a neutral apostrophe.
	Thanks to the TC fonts, we can do this even when the default CM
	text fonts are in use.

	Fixes <https://savannah.gnu.org/bugs/?63200>.

2022-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/ec.tmac: Remove apparently unnecessary remappings of
	styles (and reassertion of style slots in the font mounting
	position list, albeit in an unusual order (RBI instead of RIB)).
	This code frustrated the rendering of man pages with post-1.22.4
	groff for the 'dvi' output device when using EC fonts.  Instead
	remap the T and H family typefaces in all four styles
	explicitly.  (The CW and CWI faces were already handled.)  Also
	add remappings of groff+PostScriptish font names "CB" and "CBI"
	to CW EC faces of normal weight, corresponding to dvi.tmac; see
	commits 529e2ca0c4, 2002-03-23 and c9741da6c0, 2021-05-06.

	Fixes <https://savannah.gnu.org/bugs/?63194>.

2022-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an_works-with-ec.sh: Add regression test for
	Savannah #63194.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/ec_works.sh: Add unit test to validate use of EC
	fonts when "-mec" option given.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/latin2.tmac:
	* tmac/latin5.tmac:
	* tmac/latin9.tmac: Perform the character remapping shenanigans
	of the fix for Savannah #63112 only if the output device is
	"latin1" (a terminal using an 8-bit character encoding).  Only
	then can we be sure that Latin-1 glyphs will be unavailable when
	other encodings are used and that `\N` escape sequences will
	identify correct glyph indices in a font (because there is no
	font per se accessible to groff--simply a terminal implementing
	a character encoding).

2022-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (GetType1): Clarify diagnostic.
	When failing to open a font file for embedding in a PDF, mention
	this context.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.tables: Update against Unicode 15.
	No substantive changes.

	Fixes <https://savannah.gnu.org/bugs/?63188>.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: If URW fonts were located, add the directory
	where they were found to the configuration report.

	Attempts to fix <https://savannah.gnu.org/bugs/?62860> (2/2).

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4: Try to make gropdf's search for URW font files
	more deterministic.  To disambiguate cases where multiple--not
	necessarily identical--copies may be found on the system, search
	_only_ in the directory given to the `--with-urw-fonts-dir`
	configure option, if present.  This populates the "Foundry" file
	generated by the build, causing gropdf to search there first.
	(GROFF_URW_FONTS_PATH): Stop `AC_SUBST`ing `urwfontsdir` here.
	(GROFF_URW_FONTS_CHECK): `AC_REQUIRE` `GROFF_URW_FONTS_PATH` to
	be run first.  If `urwfontsdir` is not null, search only there
	for URW fonts.  Assign `urwfontsdir` the value of the directory
	in which the fonts are found.  Assign it an empty value if none
	are found.  Either way, `AC_SUBST` the variable.

	Attempts to fix <https://savannah.gnu.org/bugs/?62860> (1/2).

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (LoadFont): Clarify diagnostic.
	gropdf opens "fonts" in two distinct ways.  On the one hand, it
	opens groff font description files for essentially all
	nontrivial output.  On the other, it may open actual Type 1 font
	files for embedding in a PDF.  Make failure of the former case
	less confusable with the latter.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Document new XN/XH and related macros.

	* doc/groff.texi (Creating a table of contents):
	* doc/ms.ms (Creating a table of contents):
	* tmac/groff_ms.7.man (Creating a table of contents): Do it.

	Fixes <https://savannah.gnu.org/bugs/?63110>.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gxditview]: Support `-version`, `--version` option.  As a C
	program, gxditview had no access to the (C++) libgroff
	`Version_string` symbol, so construct a header file to store
	this datum at build time.  If groff gets other user-facing C
	programs, we should consider generating this header in
	src/include instead.

	* src/devices/xditview/xditview.am: Generate "groff_version.h"
	file.
	(GXDITVIEW_GROFF_VERSION_H): Define new macro.
	($(GXDITVIEW_GROFF_VERSION_H)): Define target to generate file.
	(XDITVIEW_GENHDRS): Add $(GXDITVIEW_GROFF_VERSION_H).

	* src/devices/xditview/xditview.c: Include new header file.
	(Syntax): Report newly supported options.
	(main): Recognize and handle new options.

	* src/devices/xditview/gxditview.1.man (Synopsis): Document
	them.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[gxditview]: Update usage message production and contents.

	* src/devices/xditview/xditview.c: Use C99 Boolean type.
	(Syntax): Accept additional Boolean argument indicating whether
	the usage message is to be issued due to an error.  Write
	message to stderr if so, and stdout otherwise.  Stop presuming
	length of output line; guessing where to wrap is unreliable due
	to variable terminal width and length of argv[0].  Write one
	line per invocation mode of the program.  Stop duplicatively
	documenting standard X Toolkit options.  Exit with standard C
	library `EXIT_FAILURE` status if there was an error, and
	`EXIT_SUCCESS` otherwise.
	(main): Refactor to prepare for `--version` support.

	* src/devices/xditview/gxditview.1.man (Synopsis): Sync list of
	options with usage message.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Recognize "--version" as
	synonym for "-v".  To achieve this, use Getopt::Long instead of
	Getopt::Std.
	* src/utils/afmtodit/afmtodit.1.man (Synopsis, Options):
	Document it.

2022-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/pdfmom.pl: Recognize "--version" as synonym
	for "-v".
	* src/devices/gropdf/pdfmom.1.man (Synopsis, Description):
	Document it.

2022-10-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (version): Identify as a GNU program.

2022-10-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grolj4/grolj4.1.man (Typefaces): Add new
	subsection.

	Fixes <https://savannah.gnu.org/bugs/?60929>.  Thanks to T. Kurt
	Bond for the report.

2022-10-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/meref.me.in (Columnated Output): Document persistence of
	`$s` register value across columnation mode changes.

	Fixes <https://savannah.gnu.org/bugs/?62717>.  Thanks to Dave
	Kemper for the report.

2022-10-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/meref.me.in: Annotate empty default arguments more
	consistently.

	Fixes <https://savannah.gnu.org/bugs/?62801>.  Thanks to Dave
	Kemper for the report.

2022-10-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/meref.me.in: Fix documentation error.
	(Summary) <\_>: Describe as "underrule", not "underscore".
	These are distinct: the latter is a glyph; the former is drawn
	by typesetters and rendered with SGR attributes on terminals.

2022-10-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* NEWS: Advise users of changes to "name" directive handling in
	font description files.

	Fixes <https://savannah.gnu.org/bugs/?61423>.  Thanks to Dave
	Kemper for the report.

2022-10-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/number.cpp: Refactor and fix code style nits.
	Boolify and rename static (local) functions.
	- parse_expr   -> is_valid_expression
	- start_number -> is_valid_expression_start
	- parse_term   -> is_valid_term
	Rename preprocessor macro `SCALE_INDICATOR_CHARS` to
	`SCALING_UNITS`.
	(is_valid_expression, is_valid_term): Rename parameters and
	demote them from `int` to `bool`.
	- scaling_indicator -> scaling_unit (no demotion)
	- parenthesised     -> is_parenthesized
	- rigid             -> is_mandatory
	(is_valid_expression_start, is_valid_expression, is_valid_term):
	Return Boolean rather than integer literals.
	(get_vunits, get_hunits, get_number_rigidly, get_number)
	(get_integer): Update call sites of renamed functions.  Replace
	Boolean-valued integer literals used as Booleans with Boolean
	literals and annotate their purposes.  (See <https://\
	stackoverflow.com/questions/38076786/\
	why-doesnt-c-support-named-parameters>.)
	(get_vunits, get_hunits, get_number, get_integer): Replace `0`
	in assertions with a communicative predicate.  In all of these
	it's an unhandled `switch()` case.

2022-10-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_expr_test, do_zero_width): Use
	better terminology in diagnostic messages.

2022-10-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Fix Savannah #63151.

	* src/roff/troff/input.cpp (read_draw_node): Throw "delim"
	warning diagnostic when a drawing escape sequence ends the line
	without a closing delimiter.

	Fixes <https://savannah.gnu.org/bugs/?63151>.

2022-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/fallbacks.tmac: Define fallbacks for characters in ISO
	Latin-{2,5,9} but not in Latin-1.

	Fixes <https://bugs.debian.org/782903>.  Thanks to Rafal Pietrak
	for the report.

2022-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Fix Savannah #63149.

	* src/roff/troff/reg.cpp (alter_format): Throw comprehensible
	diagnostic when input delete character encountered in register
	format.

	Fixes <https://savannah.gnu.org/bugs/?63149>.

2022-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Describe an input delete character comprehensibly.

	* src/roff/troff/input.cpp (token::description): The delete
	character (ISO 127 decimal, EBCDIC 7) is a valid `TOKEN_CHAR`
	but is not printable.  Don't attempt to output it literally in
	diagnostics; describe it in a phrase instead.

2022-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Apply consistent terminology.

	* src/roff/troff/input.cpp: Rename functions to better align
	with our documentation, and decouple their names from an
	assumption of diagnostic severity.  Also give them imperative
	names since they are called for their side effects, not their
	return values.
	- empty_name_warning -> diagnose_missing_identifier
	- non_empty_name_warning -> diagnose_invalid_identifier
	(diagnose_missing_identifier): Refer to absent operand as
	"identifier", not "name", in diagnostic messages since the
	latter (strictly) refers to the request/macro/string/diversion
	name space, and this function is also used to gather register
	identifiers.

2022-10-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Fix Savannah #63112 (3/3).

	* tmac/latin2.tmac: Replace characters that ISO Latin-1 has but
	Latin-2 doesn't.  Map characters that ISO Latin-2 has and
	Latin-1 doesn't to their numeric code points.

2022-10-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Regression-test Savannah #63112 (3/3).

	* tmac/tests/latin2_works: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Fix Savannah #63112 (2/3).

	* tmac/latin5.tmac: Replace characters that ISO Latin-1 has but
	Latin-5 doesn't.  Map characters that ISO Latin-5 has and
	Latin-1 doesn't to their numeric code points.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Regression-test Savannah #63112 (2/3).

	* tmac/tests/latin5_works: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Fix Savannah #63112 (1/3).

	* tmac/latin9.tmac: Replace characters that ISO Latin-1 has but
	Latin-9 doesn't.  Map characters that ISO Latin-9 has and
	Latin-1 doesn't to their numeric code points.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Regression-test Savannah #63112 (1/3).

	* tmac/tests/latin9_works: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp: Refactor to parallelize logic in
	similar routines; namely, those handling escape sequences that
	accept newlines as argument delimiters.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp: Fix inconsistencies in handling of
	escape sequences that accept newlines as delimiters.  Some threw
	spurious warnings as in Savannah #63011; others failed to treat
	a newline-terminated escape sequence also as the ending of an
	input line.
	(do_name_test, do_zero_width): Suppress spurious warning.
	(do_zero_width, do_width, do_special): Synthesize newline to
	terminate input line.

2022-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/\
	some_escapes_accept_newline_delimiters.sh: Add test cases for
	`\A` and test formatted output of escape sequences, not just the
	absence of diagnostics from permitted use of newlines as
	argument delimiters.

2022-09-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libdriver/input.cpp (do_file): Make use of
	positioning commands before the first page is started fatal
	errors; they suggest ill-formed input.  The 'p' command
	clobbers the vertical position anyway.  (See
	https://bugs.debian.org/421437 for discussion.)

2022-09-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdf.tmac: Add inclusion guard; if a `pdfmark` macro is
	already defined, skip inclusion of this file.  Unfortunately
	there are multiple name collisions with pdfmark.tmac.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp:
	* src/roff/troff/request.h: Trivially refactor.  Boolify
	`interpolate_macro` and `request::invoke`.  Also rename
	parameter `no_next` to `do_not_want_next_token`, exposing
	potentially confusing interface design.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (spring_trap, interpolate_string)
	(interpolate_string_with_args): Improve error diagnostics: when
	a sprung trap or an interpolation fails because it's being
	attempted on a request, say so explicitly and _name_ it.  If the
	argument to the trap-planting request or to a string
	interpolation escape sequence is itself an interpolation, this
	name might not be obvious.  Consider:
	  .wh \n[pos] \*[mac]
	  .em \*[mac]
	  .itc 1 \*[mac]
	  \*[\*[mac]]
	Supplying this information requires no additional overhead.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (interpolate_string): Trivially
	refactor.  Rename function parameter from `s` to `nm` to more
	obviously align with `interpolate_string_with_args()`.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_zero_width, token::description)
	(interpolate_string, interpolate_string_with_args)
	(token::get_char): Revise diagnostic messages to stop presuming
	the identity of the escape character.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (set_escape_char): Recast error
	message to describe attempted operation and tell the user what
	we're doing about being instructed to use an invalid escape
	character.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_size): Be more helpful to
	ambiguous type size escape sequence users; offer advice in
	terms of the current escape character.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (main): Fix SEGV when exiting
	gxditview.  The `postdriver` pointer always referred to
	allocated memory except when the `-X` option was given; it was
	then assigned the address of a #defined string literal.  It was
	thus statically allocated and an error to attempt to `free()`
	it.  Duplicate the string on the heap instead so that we can
	clean up uniformly regardless of postprocessor.  Problem caused
	by me when introducing `xexit()` in commit 6769e56aab, 20 June.

2022-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (@o, n2, sk (f, ++): Consistently call `@err`
	macro with `do`.

2022-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Initialize new register `_f`, the value of `$m`
	{column count} of the previous pending footnote, to zero,
	meaning there is no previous pending footnote.
	(@o): Emit diagnostic when flushing footnotes into a different
	column layout than the pending footnote last added.  Set `_f` to
	zero.
	((f): Emit diagnostic when enqueueing footnote using a different
	column layout than the previous pending footnote used.  Set `_f`
	to `$m`.

	Fixes <https://savannah.gnu.org/bugs/?58736>.  Thanks to Dave
	Kemper for the report and discussion.

2022-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Explicitly initialize and annotate internal
	register `?f`.

2022-09-08  Nikita Ivanov <nikita.vyach.ivanov@gmail.com>

	* tmac/ps.tmac: Fallback definitions for glyphs that usually
	come from special fonts should use `schar` instead of `fchar`.
	{Define fallback special characters using `schar` instead of
	`fchar` for glyphs that we do not expect to find in text fonts;
	that is, they don't have bold, italic, and bold-italic stylistic
	variants.  This means all special character definitions in the
	file except for rules, ligatures, and digraphs.  Problem dates
	back to a series of commits from March 2002 to February 2003,
	straddling the introduction of the `schar` request in November
	2002. --GBR}

	Fixes <https://savannah.gnu.org/bugs/?62955>.

2022-09-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Slightly simplify new `XN` macro feature to align it more
	closely with Berkeley TOC macro behavior; don't prepend the
	table of contents entry with the section number (`\*[SN]`).  If
	desired, a document can define `XN-REPLACEMENT`.  This does not
	regress "pdfmark.ms" because it uses an alternative, older
	implementation of these features from "spdf.tmac".

	* tmac/s.tmac (XH-UPDATE-TOC): Update comments.
	(XN-REPLACEMENT): Do it.

2022-09-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdf.tmac (pdf*href-I): Call `pdf:error` macro by its
	correct name.  Both this macro file and
	contrib/pdfmark/pdfmark.tmac seem to want to use the 'pdf'
	prefix for their macro names, with much confusing overlap.
	Problem dates back to commit 87046b2948, 2011-07-26.

2022-09-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS_CHECK): If Ghostscript or awk are
	unavailable, skip only the prepopulation of the URW font search
	path instead of the entire check.  This way we still locate the
	URW fonts if they are in one of several standard locations.

	Fixes <https://savannah.gnu.org/bugs/?62775>.

2022-09-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Trivially refactor.

	* src/roff/troff/input.cpp (do_name_test): Boolify and rename
	local variables to..."impredicate" their names.
	  - bad_char -> got_bad_char
	  - some_char -> got_some_char

2022-09-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grodvi, ...]: Trivially refactor.

	Tidy up #includes of the "assert.h" header, which we locally
	provide to ensure a C99-conformant implementation.  Drop
	inclusion of header from files that don't directly need it, add
	it where they do, and spell the inclusion consistently with
	double quotes to cue the reader of its local status.

	* src/devices/grodvi/dvi.cpp:
	* src/devices/grolj4/lj4.cpp:
	* src/libs/libdriver/printer.cpp:
	* src/preproc/eqn/box.cpp:
	* src/preproc/eqn/delim.cpp:
	* src/preproc/eqn/pile.cpp:
	* src/preproc/eqn/script.cpp: Add inclusion.

	* src/include/driver.h:
	* src/libs/libgroff/fontfile.cpp:
	* src/preproc/eqn/eqn.h:
	* src/preproc/html/pushback.cpp:
	* src/preproc/refer/refer.h:
	* src/preproc/tbl/table.h:
	* src/utils/addftinfo/addftinfo.cpp: Drop inclusion.

	* src/include/itable.h:
	* src/include/stringclass.h:
	* src/libs/libbib/linear.cpp:
	* src/libs/libbib/search.cpp:
	* src/libs/libgroff/color.cpp:
	* src/libs/libgroff/font.cpp:
	* src/libs/libgroff/nametoindex.cpp:
	* src/libs/libgroff/prime.cpp:
	* src/libs/libgroff/searchpath.cpp:
	* src/preproc/html/pre-html.cpp:
	* src/preproc/preconv/preconv.cpp:
	* src/preproc/soelim/soelim.cpp:
	* src/utils/indxbib/indxbib.cpp:
	* src/utils/lkbib/lkbib.cpp:
	* src/utils/lookbib/lookbib.cpp: Respell inclusion.

	Fixes <https://savannah.gnu.org/bugs/?63079>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-09-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff, ...]: Trivially refactor.

	Boolify and rename internal library function from
	`invalid_input_char` to `is_invalid_input_char`.

	* src/include/lib.h: Do it.

	* src/libs/libgroff/font.cpp (text_file::next_line):
	* src/preproc/eqn/lex.cpp (file_input::read_line):
	* src/preproc/eqn/main.cpp (read_line, main):
	* src/preproc/pic/lex.cpp (file_input::read_line,
	simple_file_input::get, simple_file_input::peek):
	* src/preproc/pic/main.cpp (top_input::get, top_input::peek)
	(do_file):
	* src/preproc/refer/command.cpp (input_stack::push_file):
	* src/preproc/refer/refer.cpp (do_file, do_bib):
	* src/roff/troff/env.cpp (environment::make_tag):
	* src/roff/troff/input.cpp (file_iterator::fill)
	(file_iterator::peek, get_char_for_escape_parameter)
	(transparent_translate, read_request, asciify)
	(input_char_description, read_string, transparent_file,
	set_string): Update call sites.

2022-09-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Tweak diagnostic messages.

	* src/roff/troff/input.cpp (token::description)
	(input_char_description): Consistently use articles in
	descriptive noun phrases.

2022-09-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Tweak diagnostic messages.

	* src/roff/troff/input.cpp (non_empty_name_warning): Say
	"identifier", not "name", in diagnostic message; it can be
	thrown for attempted assignments to invalid register
	identifiers, and some of our documentation refers to identifiers
	in the name space shared by requests, macros, strings, and
	diversions as "names".

	* src/roff/troff/env.cpp (hyphen_trie::read_patterns_file):
	* src/roff/troff/input.cpp (get_char_for_escape_parameter)
	(token::usable_as_delimiter, non_empty_name_warning)
	(pipe_source, psbb_locator::psbb_locator, open_request)
	(opena_request, define_class, pipe_output, system_request):
	Consistently say "_is_ not allowed".  The zero copula poses too
	great a risk of incomprehension IMO.

2022-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Add internal string `doc-Lk-font` to manage the typeface
	in which to render URIs.

	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Add it.  Use roman instead of (Courier)
	bold.  This is more consistent with man(7)'s `UR` and less with
	mandoc(1).

	* tmac/doc.tmac (Lk): Use it instead of `doc-Sy-font`.

2022-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Fix Savannah #59738.

	* tmac/doc.tmac (Lk): Process further macro arguments more like
	other macros do, calling `doc-print-recursive`.  This permits
	recognition of end-of-sentence punctuation in the argument list.

	Fixes <https://savannah.gnu.org/bugs/?59738>.

2022-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Regression-test Savannah #59738.

	* tmac/tests/doc_Lk-respect-sentence-ending-punctuation.sh: Do
	it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Fix code style nit.  Rename `doc-arg-limit` to
	`doc-arg-count`.  This register doesn't track any sort of limit
	on the number of arguments you can give to an mdoc(7) macro, or
	anything like that.  It is simply a count of the number of
	arguments visible to the currently operating macro.

	* tmac/doc.tmac:
	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff:
	* tmac/mdoc/doc-syms: Do it.

2022-09-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Fix errors in documentation regarding which escape
	sequences accept newlines as argument delimiters, and other
	inaccuracies.

	* doc/groff.texi (Escape Sequences): Cover general cases before
	exceptional ones.  Leaders can be used as argument delimiters.
	Call out letters and numerals as (usually) usable as well.
	Correct an almost completely inaccurate list of escape sequences
	that accept a newline as an argument delimiter: \A, \b, \o, \w,
	\X, and \Z do; \B does not.  Correct example of use of newline
	as delimiter with \o escape sequence.  Stop referring to the
	decimal point as an "operator".  Drop "newline" from a list of
	prohibited delimiters by several escape sequences since it has
	already been discussed.

	* man/groff.7.man (Escape sequences): Replace weaksauce cross
	reference to our Texinfo manual with a proper discussion of
	acceptable delimiters in escape sequences, synced with the
	foregoing change.  Stop using quotation marks around escape
	sequences, except for "\ " which obviously needs it.

	Fixes <https://savannah.gnu.org/bugs/?63002>.  Thanks to Dave
	Kemper for the report.

2022-09-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Don't throw a spurious warning when using newline as
	delimiter with the few escape sequences that permit this.

	* src/roff/troff/input.cpp (do_overstrike, do_bracket, do_width)
	(do_special): Do it.

	Fixes <https://savannah.gnu.org/bugs/?63011>.  Thanks to Bjarni
	Ingi Gislason for the report and Dave Kemper for the discussion.

2022-09-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Add regression test for Savannah #63011.

	* src/roff/groff/tests/\
	some_escapes_accept_newline_delimiters.sh: Do it.
	* src/roff/groff/groff.am (groff_TESTS): Run it.

2022-09-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_special): Fix code style nit;
	align function definition with declaration (internal linkage).

2022-09-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/ps.cpp (ps_printer::special)
	(resource_manager::process_file): Fix code style nit.  Mark
	static structs initialized within functions and never modified
	thereafter as `const`.  This attempts to work around an apparent
	false positive from AddressSanitizer.  If it doesn't pacify
	ASAN, please explain to me how constant structure members
	initialized to string literals and pointers to functions within
	the translation unit can ever be null.  If that is infeasible,
	please report a bug to your compiler vendor.

	Fixes (addresses, at any rate) https://savannah.gnu.org/bugs/\
	?61643>.  Thanks to Bjarni Ingi Gislason for the report.

2022-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Refactor: relocate most rendering option handling to
	"doc.tmac" from "doc-ditroff" and "doc-nroff", cutting down on a
	lot of duplication.  The `S` register retains separate handling.

	* tmac/doc.tmac:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Do it.

2022-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff (doc-setup-page-layout):  In troff mode,
	if the user does not define the `LL` register, use the device's
	default line length, not 6.5 inches.  If the user does not
	define the `LT` register, make the default line length for
	titles the same as the regular line length, not 6.5 inches
	independently of it.  This is consistent with man(7)'s handling
	of `LL` and `LT`.

2022-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `AD` string to set default adjustment mode.

	* tmac/mdoc/doc-common (Sh): Set adjustment mode to
	user-specified default, not troff's default (and not only in
	troff mode).

	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Process `AD` string setting from command
	line as man(7) does.

	* tmac/groff_mdoc.7.man (Formatting with groff, troff, and
	nroff): Document it.

	* NEWS: Add and update items.

	Fixes part of <https://savannah.gnu.org/bugs/?63046>.

2022-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac (doc-tag-list): Fix code style nit: don't give
	`ad` request a numeric argument.  Say `l` instead of `0`.

2022-09-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Align inter-paragraph spacing with man(7).

	* tmac/mdoc/doc-common: Use `doc-paragraph-space` when spacing
	prior to section and subsection headings instead of spacing by
	the 1v default.
	* tmac/mdoc/doc-ditroff: Align inter-paragraph distance amount
	in troff mode with man(7), reducing to 0.4v from 0.5v.

2022-09-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-nroff: Map monospaced fonts (CR, CB, CI, CBI) to
	standard styles as man(7) has done for 15 years.  This silences
	warnings from the formatter when a man page attempts to use
	fonts from the Courier family in tbl(1) tables, which is about
	the only place a reasonable man page attempts such a thing.

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Stop prefixing center header with name of operating
	system.  This was hard-coded to "BSD" and stuck on all mdoc(7)
	pages using a default manual section number, regardless of host
	operating system.  Bad idea.  Further, the argument to the `Os`
	call, if any, or a default, is always disclosed in the left
	footer.

	* tmac/mdoc/doc-common: Do it.
	(Dt): Initialize `doc-volume` as empty and annotate it;
	calling the macro with a numeric second argument overrides the
	fallback default of "LOCAL".  A slash is no longer needed to
	separate a recognized architecture string from the OS name, so
	drop it.

	* tmac/tests/doc_smoke-test.sh: Update test expectations.

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Drop dead code.  The register
	`doc-volume-operating-system-ateol`, introduced in groff 1.18
	{July 2002}, was being tested but never set to a nonzero value.
	In fact, it seems never to have been.

	* tmac/mdoc/doc-common: Get rid of it...
	(Dt): ...and the dependent block.

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Make `Ux` render "Unix" in mixed case.

	* tmac/mdoc/doc-syms (Ux): Do it.  Also remove local string
	after we're done with it.

	Continues work begun prior to groff 1.22.4 release.

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Align spacing around headers with man(7).

	* tmac/doc.tmac (doc-save-global-vars, doc-restore-global-vars):
	* tmac/mdoc/doc-common (Rd):
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Stop defining, saving, and restoring
	`doc-header-space`.

	* tmac/mdoc/doc-common (doc-header): When starting new document
	and not continuously rendering, space by one half-inch instead
	of by the now-defunct `doc-header-space` amount (which,
	strictly, should not have applied to this measurement).  If
	continuously rendering, extend page length by 1v to accommodate
	header line.  After formatting header, if not continuously
	rendering, space to 1 inch below first text baseline.

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Support `C` register for consecutive page numbering.

	* tmac/mdoc/doc-common (Dd): Reset page number to 1 upon new
	document only if not consecutively numbering.

	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Process `C` register setting from command
	line as man(7) does.

	* tmac/groff_mdoc.7.man (Formatting with groff, troff, and
	nroff): Document it.

	Fixes part of <https://savannah.gnu.org/bugs/?63046>.

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Align trap management more closely with man(7).

	* tmac/mdoc/doc-common: Call new macro (see below)
	`doc-set-up-continuous-rendering` when initializing, if that
	mode is configured.
	(doc-ne): New macro replaces `ne` request
	in continuous rendering mode.  It extends the page length by the
	amount in the argument or by 1v if none given.
	(doc-bp): New macro replaces `bp` request in continuous
	rendering mode, setting the page length to the vertical drawing
	position.
	(doc-set-up-continuous-rendering): New macro renames requests to
	emplace the foregoing.
	(Dd): Interpret this macro call strictly as starting a new
	mdoc(7) document.  (andoc.tmac already makes this assumption,
	and has for over 20 years.  groff_mdoc(7) and mandoc_mdoc(7)
	also prescribe the sequence `Dd`, `Dt`, `Os`.)  We require this
	invariant even more rigidly now because it's the only way we can
	be sure that we can process multiple documents while rendering
	headers and footers with information corresponding to the
	appropriate document.  (man(7)'s `TH` has an advantage here in
	that calling it is "atomic": from its arguments alone you can
	obtain everything you need to know to format the header and
	footer.  In mdoc(7), permuting the initialization macro order
	reliably produces chaos.)  Break the page (if necessary)
	_before_ processing any arguments (instead of after), to flush
	the previous page's footer.  Stop calling `doc-set-up-titles`
	here; we don't have enough information to do that yet.  Also
	stop writing the PDF bookmark here, because `doc-document-title`
	and `doc-section` will not reflect the new page content yet.
	(Os): Once the `doc-operating-system` string content has been
	determined, call `doc-set-up-titles`, write the PDF bookmark for
	the page, and call `doc-header`, causing the page header to be
	formatted.  These changes further imply a stronger requirement
	on initialization macro ordering being canonical.

	Fixes <https://savannah.gnu.org/bugs/?62774> (7/7).

2022-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Trivially refactor.  Relocate string and macro
	definition within file.  mdoc(7) mandates that the document
	setup macros `Dd`, `Dt`, and `Os` be called in that order;
	arrange their definitions accordingly, for maintainability.

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Refactor.  Rename strings and macro for clarity.  These
	things don't only affect headers.
	- doc-header-string ->       doc-pageref
	- doc-header-string-saved -> doc-pageref-saved
	- doc-setup-header ->        doc-set-up-titles

	* tmac/doc.tmac:
	* tmac/mdoc/doc-common: Do it.

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Refactor.  There is no difference in
	`doc-header-string` and `doc-setup-header` between the files
	"doc-ditroff" and "doc-nroff", so define them only once, in
	"doc-common".

	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Do it.

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Align footer management more closely with man(7).

	* tmac/doc.tmac (doc-save-global-vars, doc-restore-global-vars):
	* tmac/mdoc/doc-common (Rd):
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Stop defining, saving, and restoring
	`doc-footer-space`.

	* tmac/mdoc/doc-common (doc-break-body-text): New macro, called
	only when not continuously rendering, schedules a page break.
	(doc-footer): Stop vertically spacing by `doc-footer-space`,
	instead relying upon a trap to move us here.

	* tmac/mdoc/doc-ditroff (doc-setup-header):
	* tmac/mdoc/doc-nroff (doc-setup-header): Set traps at the end
	of the page where man(7) does by default; break the body text at
	1 inch from the page bottom, and write the footer at ½ inch.

	* tmac/mdoc/doc-nroff (doc-setup-header): Add 1/6 em "thin
	space" between man page name and parenthesized section, for
	precise parity with doc-ditroff implementation.  (`\|` does not
	take up any character cells on nroff devices.)

	Fixes <https://savannah.gnu.org/bugs/?62774> (6/7).

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (Dt, Dd): Emit diagnostic warnings if
	macros called with no arguments.

	Fixes <https://savannah.gnu.org/bugs/?62774> (5/7).

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Fix code style nit: stop using Control+G as an escape
	sequence argument delimiter.  This is not necessary in groff and
	hasn't been for at least thirty years.  See the node/section
	"Implementation Differences" of our Texinfo manual.  Our mdoc
	implementation does not operate in compatibility mode, so using
	control characters like this obfuscates input to no advantage.

	* tmac/doc.tmac:
	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff:
	* tmac/mdoc/doc-syms: Do it.

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (doc-footer): Pull more footer concerns
	into this macro.  Don't bail out if continuously rendering;
	instead, format the appropriate footer text if we are.  For now,
	break the page only if we are not continuously rendering.
	(doc-end-macro): Call `doc-footer` instead of formatting footer
	here.

	Fixes <https://savannah.gnu.org/bugs/?62774> (4/7).

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (doc-end-macro): When continuously
	rendering, set the page reference (e.g., "ls(1)") in the right
	footer instead of repeating the left footer.  Thanks to Ingo
	Schwarze for the discussion.

	* tmac/tests/doc_smoke-test.sh: Update expectations of footer
	regression test.

	Fixes part of <https://savannah.gnu.org/bugs/?62926>.

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (doc-end-macro): Reset strings to reduce
	info leaks from one man page to the next.

	Fixes <https://savannah.gnu.org/bugs/?62774> (3/7).

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (Dt): Stop reinitializing `doc-volume`
	and `doc-section`.  This is the job of package initialization
	{and, soon, the end-of-input macro}.

	Fixes <https://savannah.gnu.org/bugs/?62774> (2/7).

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common: Populate default date string
	`doc-date-string` with "UNDATED".
	(Dd, Dt, Os): Make more orthogonal: stop touching
	`doc-topic-name`.  It is "doc.tmac"'s job to initialize it and
	the `Nm` macro's job to update it.
	(Dd): Do nothing if given no arguments.  (You can still blank
	out the document date with an explicitly empty argument:
	  .Dd ""
	.)

	Fixes <https://savannah.gnu.org/bugs/?62774> (1/7).

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common: Change `doc-default-operating-system`
	string from "BSD" to "GNU", per discussion with Ingo Schwarze.
	See <https://lists.gnu.org/archive/html/groff/2022-07/\
	msg00280.html>.

	* tmac/tests/doc_smoke-test.sh: Update expectations of footer
	regression test.

2022-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common (Dt): Delete lingering and useless
	definition of `doc-command-name` string.  Thanks to Steffen
	Nurpmeso for the report.  See commit e9e92ee008, 27 August.

2022-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/pic/pic.ypp (not_lower_than): Emit deprecation
	warning for use of 'rand()' with a (non-empty) argument.  The
	man page has declared it thus for over 30 years, at least since
	groff 1.02 (June 1991).

2022-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/pic/pic.ypp (object_spec): Emit deprecation
	diagnostic for "plot" command.  The man page has declared it
	thus for over 30 years, at least since groff 1.02 (June 1991).

2022-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/pic/pic.ypp (placeless_element): Explicitly say
	that an unsafe command is being ignored in diagnostic.

2022-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/main.cpp (main): Drop man page reference from
	deprecation diagnostics.  The man page might be installed with a
	prefix determined at configuration time, and that's too much
	trouble to mess with for construction of a message.  Trust the
	user of these ancient options to try reading the man page with
	the same name as the command.

2022-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Revise discussion of measurements.

	* doc/groff.texi: Drop Texinfo @codequote* command brackets
	around revised sections; relevant nodes have been reviewed for
	correct glyph usage.  Move concept index entries for obsolescent
	term "machine units" to same location as "basic units".
	Bump document date.
	(Measurements): Rewrite presentation.  We have already
	introduced page geometry concepts, including the concept of
	basic units.
	(Motion Quanta): New subsection node; introduce this concept
	much sooner, right after measurement units.  Relocate
	documentation of `.H` and `.V` registers from a miscellaneous
	read-only register list here.  Introduce example of rounding to
	horizontal motion quantum.
	(Default Units): Revise discussion.  Stop abusing @result
	notation in example.
	(Built-In Registers): Relocate `.H` and `.V` as above.

	* man/groff.7.man: Sync with Texinfo content updates.

	Fixes <https://savannah.gnu.org/bugs/?61432>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-09-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	Drop groff_filenames(5) document.  It says nothing accurate that
	is not covered elsewhere.

	* contrib/groff_filenames: Delete.
	* doc/doc.am (GROFF_MAN_PAGES): Drop.
	* src/roff/groff/groff.1.man: Drop cross reference to it.
	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?61818>.

2022-09-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/tbl.1.man (Table data): Generalize discussion
	of roff control line use in tables.
	(Examples): Illustrate how to embed a comment in a table.

2022-08-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* NEWS: man(7)'s `TS` no longer adds vertical space.  See commit
	7ec36dc9b9, 30 July.

2022-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/main.cpp (main): Issue deprecation warning
	upon use of '-p' or '-s' options.  The eqn(1) man page has
	documented these as deprecated since at least groff 1.02 (June
	1991).  Don't count on them sticking around another 30 years.

2022-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/main.cpp (main): Clarify error diagnostics
	regarding invalid option arguments.  Identify the option being
	handled at the time and characterize the argument as "invalid",
	not "bad".

2022-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[eqn]: Drop support for undocumented '-D' option.  It has been
	undocumented, and issued a warning of its obsolescence upon use,
	for 30 years, since groff 1.06 (September 1992).  That's plenty
	long enough for a deprecation cycle.

	* src/preproc/eqn/main.cpp (main): Do it.
	* NEWS: Add item.

2022-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: (EX, EE): Always break line, even if call invalid.

	* tmac/an.tmac (EX, EE):
	* tmac/an-ext.tmac (EX, EE): Do it.  Ingo Schwarze pointed out
	that page authors will expect breaking semantics from these
	macros even if using them in an ill-formed way.  In a
	well-formed document, the breaks are redundant but harmless (the
	later `nf` and `fi` requests, respectively, also cause breaks).

2022-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Trivially refactor.

	* tmac/doc.tmac:
	* tmac/mdoc/doc-common: Rename string `doc-command-name` to
	`doc-topic-name`; the former is misleading for man pages not in
	sections 1, 6, or 8.

2022-08-25  Bjarni Ingi Gislason <bjarniig@vortex.is>

	* man/groff_char.7.man: Fix bad example syntax.

	Fixes <https://savannah.gnu.org/bugs/?62959>.

2022-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Trivially refactor.

	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Stop using "Null" as an empty string
	indicator when comparing a string interpolation to an empty
	parameter will serve just as well; it is also more idiomatic.
	The string in question, `doc-section`, is never formatted if it
	is empty anyway; the very tests at issue, which populate
	`doc-header-string`, ensure this.

2022-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (environment::set_family): Throw error
	if user requests a font family that (when combined with the
	current style) can't be resolved to a real font name.  Fixes a
	regression introduced by me in commit d8cb8cf9d8, 2021-09-15,
	arising from a revision of font selection logic in node.cpp to
	enable a bunch of _other_ font error diagnostics.

	Fixes <https://savannah.gnu.org/bugs/?62941>.  Thanks to Dave
	Kemper for the report and two useful end points for a bisection.

2022-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (environment::set_family): Add some
	paranoia.  Add `assert()`s on the previous font mounting
	position still being valid and the font family dictionary lookup
	not returning a null pointer.  Add an early return for the
	latter case (which should be impossible).

2022-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/node.cpp (font_family::make_definite):
	Refactor.  Rename parameter from inscrutable `i` to
	`mounting_position`.  Add `assert()` to enforce invariant: we're
	passed a mounting position that is nonnegative.  Use `pos` as
	short alias of parameter once we're into the function body.
	Relocate conditional branches to front-load early returns as
	well as those requiring little code to handle.  This reduces the
	average indentation level of the function, a readability win.

2022-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Restore robustness to `EE` misuse.

	* tmac/an.tmac: Add `an*is-in-example` register to track state
	of within-exampleness.  Not doing so can cause a spurious use of
	`EE` to wrongly set the inter-paragraph distance to zero.
	(TH): Initialize register.
	(EX): Test register; if set, ignore macro call and, if
	`CHECKSTYLE` warnings are on, throw diagnostic.  Set register.
	(EE): Test register; if clear, ignore macro call and, if
	`CHECKSTYLE` warnings are on, throw diagnostic.  Clear register.

	* tmac/an-ext.tmac (EX, EE): Similar, using `mX` register.
	Because AT&T troff had no `return` request, invert the sense of
	the tests and put the entire macro bodies inside conditionals.

	This regressed post-1.22.4.  Thanks to Ingo Schwarze for the
	report and a proposed patch.

2022-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Refactor.  Rename `mX` to `mZ` so we can use
	`mX` for an "in-example" state register in a future commit.
	Rename `mE` to `mF` to store the current font's mounting
	position.  Bizarrely, `mF` was not already used for this
	purpose.

2022-08-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/error.cpp (do_error_with_file_and_line):
	Trivially refactor.  Use separate string constant for invariant
	material.  (This will make it easier to, for example, store the
	diagnostic level strings in an array that can be indexed by
	their corresponding `enum` type.)

2022-08-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (fatal_with_file_and_line)
	(error_with_file_and_line, debug_with_file_and_line): Align more
	closely with GNU Coding Standards regarding diagnostics: don't
	suffix the colon after the program name with a space when
	location information follows.

2022-08-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grohtml/grohtml.1.man: Fix erroneous claim.
	Images are not generated when "baseline rules" or "box rules"
	are encountered in the input.  These are troff special
	characters; the former is converted to an underscore and the
	latter to U+2502, "box drawings light vertical".  This remains
	true even if a series of them is drawn with the `\l` escape
	sequence.  (I also checked vertical line drawing with `\L`.
	grohtml's handling of that provoked a rather wet eructation from
	my lower esophageal sphincter--the output is assuredly not
	correct.  But it's still not an image.)

2022-08-22  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Bug #62934 - after glyph remapped mark it as used

	When many glyphs are remapped from code points above 255
	such as writing documents in cyrillic with the U-TR fonts,
	gropdf starts reusing code points in the range 128-255.
	If subsequently one of those code points is actually required,
	such as \(em (code 138), and it has been replaced by a
	cyrillic, then it needs to be mapped to another free code.

	To determine if a particular code point is free each glyph
	has a USED flag. The bug was caused because after remapping
	\(em to the next free glyph the USED flag was not set. So the
	next new cyrillic character to be entered was given the same
	code point as had been allocated to \(em.

	* src/devices/gropdf/gropdf.pl: Set the USED flag on remapped
	glyphs.

	Fixes <https://savannah.gnu.org/bugs/?62934>.

	Thanks to Nikita Ivanov for spotting the problem and testing
	the fix.

2022-08-20  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Bug #62923 - problem using aliased glyphs

	With a large font if 2 characters above the 255 code
	point limit are aliased, the aliased glyph has incorrect meta
	data.

	* src/devices/gropdf/gropdf.pl: Instead of duplicating a pointer
	to the font metadata, duplicate the data itself. Then, if the
	glyph is remapped to a code point under 256, the metadata is
	preserved.

	Fixes <https://savannah.gnu.org/bugs/?62923>.  Thanks to Nikita
	Ivanov for the report.

2022-08-18  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Improve parsing of troff font files.

	* src/devices/gropdf/gropdf.pl: Allow the glyph code number
	to be octal or hex as well as a decimal number. If entity_name
	is missing use name instead.

2022-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Support pic(1) "flyback" feature.

	* tmac/s.tmac (PF): Add macro; it does what `PE` formerly did,
	minus vertical spacing.
	(PE): Call `PF` and vertically space as before.

	* doc/groff.texi (ms Insertions):
	* doc/ms.ms (Tables, figures, equations, and references):
	* tmac/groff_ms.7.man (Tables, figures, equations, and
	references): Document it.

	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?60558>.

2022-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (@PS): Validate better; check for 2 arguments
	exactly.

2022-08-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pic]: Recognize `.PY` as synonym of `.PF`.

	* src/preproc/pic/main.cpp:
	* src/preproc/pic/pic.h: Add new Boolean variable,
	`want_alternate_flyback` to record `.PY` usage.

	* src/preproc/pic/main.cpp (top_input::get, top_input::peek):
	Recognize it.  Update diagnostic messages to mention it.
	(main): Define `PY` troff macro as empty if not defined.

	* src/preproc/pic/troff.cpp (troff_output::finish_picture):
	Don't advance the vertical position if `want_alternate_flyback`.
	Write out the `PY` macro call if it was on the input.

	* src/preproc/pic/pic.1.man: Document it.

	* tmac/pic.tmac (PY): Define the same as `PF`.

	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?62901>.

2022-08-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pic]: Refactor `flyback_flag`.

	* src/preproc/pic/main.cpp:
	* src/preproc/pic/pic.h:
	* src/preproc/pic/troff.cpp: Rename to `want_flyback`.

	* src/preproc/pic/main.cpp:
	* src/preproc/pic/pic.h: Demote type from `int` to `bool`.

	* src/preproc/pic/main.cpp (top_input::get, top_input::peek):
	Use parentheses to clarify operation precedence.

2022-08-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/eqn.1.man: Expand to include lists of
	recognized primitives and predefined macros.

2022-08-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* NEWS: Add item for new groff mm `V` register support.

2022-08-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/lex.cpp (do_delim): Recognize "delim on" even
	in compatibility mode, enabling tbl to toggle eqn delimiter
	recognition when it is run in compatibility mode as well.
	* src/preproc/eqn/eqn.1.man (Controlling delimiters): Update.
	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?62852>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-08-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TH): Fix spurious complaint from `CHECKSTYLE`
	feature when a custom manual section title is declared for a
	standard section number.  Thanks to Quentin Monnet for the
	report.

2022-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdfpic.tmac: Finish incomplete string renames.  Continues
	0fd6ab6b4c, 21 January.
		pdfpic*file-name -> pdfpic*file-name-base
		pspic-args -> pdfpic*pspic-args

2022-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TS): Stop inserting space before tables.  Unlike
	ms(7), man(7) has no concept of "displays" and thus none of
	"display distance".  It is up to the page author to use
	paragraphing macros around tables if vertical space is desired.
	And not up to us to impose it.

	Fixes <https://savannah.gnu.org/bugs/?62841>.

2022-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Regression-test Savannah #62841.

	* tmac/tests/an_TS-adds-no-vertical-space.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::do_bottom): Avoid
	overprinting a double-boxed table's bottom border on nroff
	devices.

2022-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Expand regression test for Savannah #49390.  Check for
	overlap of double box borders, too.

	* src/preproc/tbl/tests/\
	do-not-overlap-bottom-border-in-nroff.sh: Do it.

2022-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix Savannah #49390.

	* src/preproc/tbl/table.cpp (table::do_bottom): Avoid
	overprinting a boxed table's bottom border on nroff devices.

	Fixes <https://savannah.gnu.org/bugs/?49390>.  Thanks to Osamu
	Sayama for the report.

2022-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #49390.

	* src/preproc/tbl/tests/\
	do-not-overlap-bottom-border-in-nroff.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-07-28  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Improve slant application to lowercase Greek letters.
	<https://lists.gnu.org/archive/html/groff/2022-07/msg00210.html>

	* tmac/pdf.tmac: Slant only if the glyph is sourced from a
	special font, not a regular (text) font containing Greek glyphs.

2022-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Add italic correction support to `I` and `BI`
	macros.  Call `par*define-font-macro` with newly recognized
	third argument indicating that italic corrections should be
	applied.
	(par*define-font-macro): Apply the corrections if directed.

2022-07-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (input_char_description): Clear
	static buffer on every entry to the function so that calling it
	twice in succession where the second call populates the buffer
	with less data than the first doesn't leave garbage characters
	in a diagnostic message.  Problem appears to date back to 1991
	or earlier.

	Fixes <https://savannah.gnu.org/bugs/?62813>.

2022-07-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (token::usable_as_delimiter):
	(do_non_interpreted, interpolate_arg): Recast diagnostic
	messages for clarity.

2022-07-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Initialize section number registers. Fixes
	warnings when starting section numbering at a depth greater than
	1.

	Fixes <https://savannah.gnu.org/bugs/?62812>.

2022-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PAGE): Use 'grep -q' instead of redirecting
	standard output to null device.  The '-q' option was
	standardized in POSIX Issue 5 (1997) or earlier.  Also drop the
	redirection of the standard error stream; we have already
	checked the file named in "$descfile" for existence and
	readability.  grep should thus not emit diagnostic messages.

2022-07-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PAGE): Macro used awk(1) without
	`AC_REQUIRE`-ing a relevant macro or checking for its existence.
	Fortunately, sed is powerful enough for our needs.  Remove
	dependency on awk.  Cope with "search" directive in resolv.conf
	having multiple arguments.  Match "domain" directive in same
	file instead of "dom", which I cannot find attested (this logic
	dates to 1991).  Rename `dom` shell variable to `domains` for
	clarity, since its multiplicity could be greater than 1.

2022-07-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PAGE): Refactor: drop AC_DEFINE of
	`PAGEA4`.  This symbol appears to be a relic; it is nowhere
	tested or dereferenced.

2022-07-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tty-char.tmac: Drop definition of \[sd] special
	character.  This was superseded by commit 78e666246c, 8 May,
	which defined a fallback for the character in tty.tmac instead.
	Thanks to Dave Kemper for the catch.

2022-07-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/pdfpic_does-not-choke-on-bad-pdfinfo-output.sh:
	Skip test if "pdfinfo" command not available.

2022-07-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Add sanity checks for font description file generation
	for PDF output device, prompted by discussion with Ingo
	Schwarze.  See <https://lists.gnu.org/archive/html/groff/\
	2022-06/msg00094.html>.

	* font/devpdf/tests/basic-fonts-present.sh:
	* font/devpdf/tests/urw-fonts-present.sh: Add files.

	* font/devpdf/devpdf.am (font_devpdf_TESTS): Add the former test
	unconditionally, and the latter only if `HAVE_URW_FONTS`.

2022-07-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am: Refactor to simplify.  Now that
	symbol.map lives in the "devpdf/generate" directory along with
	the other map files, it doesn't need a dedicated Makefile target
	to produce it.
	(DEVPDFFONTMAP_1, DEVPDFFONTMAP_2): Coalesce and rename to...
	(devpdffontmapdata): ...this.
	(font/devpdf/map/symbol.map:): Drop target.
	(devpdffontmap_DATA, font/devpdf/download): Update dependencies.

2022-07-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl (LoadFoundry): Recast
	diagnostic message so that the user understands the consequence
	of failure to locate a Type 1 font file (that isn't one of the
	base 14 PostScript level 1 fonts): the font will be unavailable
	for the "pdf" output device.

2022-07-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl (LoadFoundry): Separate
	lists of Type 1 font names with spaces as well as commas, for
	better diagnostic message readability.  Also begin message in
	lowercase (per GNU Coding Standards).

2022-07-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl (LoadFoundry): Verify that
	`$foundrypath->[$j]` is defined before operating on it.

2022-07-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[afmtodit]: Clarify diagnostic message.

	* src/utils/afmtodit/afmtodit.pl: When we have excess Adobe
	Glyph List mappings for a groff special character identifier
	{making the reverse mapping from groff special character to font
	glyph name ambiguous}, report that we're ignoring the excess.
	Use "print STDERR" instead of Perl "warn" built-in since we want
	diagnostic messages to start with the name of the program
	emitting them.

2022-07-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Name and place PS->groff glyph name maps consistently.

	* font/devps/symbolmap: Rename from this...
	* font/devps/generate/symbol.map: ...to this.

	* font/devpdf/devpdf.am (font/devpdf/map/symbolmap): Rename
	target...
	(font/devpdf/map/symbol.map): ...to this.
	(font/devpdf/map/symbol.map): Copy "devps" version of file from
	its new location in the "generate" subdirectory.

	* font/devpdf/Foundry.in: Reflect rename.

	* font/devps/generate/Makefile (symbolmap): Rename target...
	($(srcdir)/symbol.map): ...to this.

	* font/devps/devps.am (DEVPSGENFILES, EXTRA_DIST):
	* font/devps/generate/Makefile (S, EURO $(SPECIALFONTS), clean):
	* src/utils/afmtodit/afmtodit.1.man: Reflect rename and
	relocation.

	* font/devps/generate/dingbats.rmap: Rename from this...
	* font/devps/generate/dingbats-reversed.map: ...to this.

	* font/devps/devps.am (DEVPSGENFILES):
	* font/devps/generate/Makefile (ZDR):
	* src/utils/afmtodit/afmtodit.1.man: Reflect rename.

	* font/devps/generate/lgreekmap: Rename from this...
	* font/devps/generate/slanted-symbol.map: ...to this.

	* font/devps/devps.am (DEVPSGENFILES):
	* font/devps/generate/Makefile (SS):
	* src/utils/afmtodit/afmtodit.1.man: Reflect rename.

	* font/devps/generate/textmap: Rename from this...
	* font/devps/generate/text.map: ...to this.

	* font/devpdf/Foundry.in:
	* font/devpdf/devpdf.am (DEVPDFFONTMAP_1):
	* font/devps/devps.am (DEVPSGENFILES):
	* font/devps/generate/Makefile (TEXTMAP):
	* src/devices/gropdf/gropdf.1.man:
	* src/devices/grops/grops.1.man:
	* src/utils/afmtodit/afmtodit.1.man: Reflect rename.

2022-07-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/ms.ps): Add dependency on "eqn", and call
	groff with "-e" option.
	* src/utils/grog/tests/smoke-test.sh: Update expected "grog"
	output for the ms.ms document.

2022-07-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/ms.ps): Add dependency on "tbl".

2022-07-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/node.cpp (suppress_node::tprint): Add source
	file line number after its name when emitting "grohtml-info", to
	aid debugging.

2022-07-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/node.cpp (get_register, get_string): Reorder
	null pointer inequality comparisons; they don't need to be in a
	funny order because it's pretty hard to mistype `!=` as an
	assignment operator.  Annotate them as null pointers to ease any
	future migration to ISO C++11.  Use primitive type constructor
	instead of C-style cast operator; this seems more idiomatic.

2022-07-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (generateImages): Flush the
	standard error stream after writing to it in a loop.

2022-07-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (RP): Recognize new optional arguments
	`no-renumber` and `no-repeat-info`, the latter as a synonym for
	the existing `no`.  The former suppresses the page number
	manipulation that normally occurs.  Drop now-unnecessary `pn 0`
	request.
	(top level, cov*first-page-init, RP, cov*print): Rename
	`cov*rp-format` to `cov*use-rp-format` for clarity.
	(cov*break-page): New macro breaks the cover page at the end,
	resetting next page number to 1 only if desired by user.
	(cov*print, cov*rp-print): Call `cov*break-page` instead of
	invoking `bp`.

	* doc/groff.texi (Document Description Macros) <RP>:
	* doc/ms.ms (Document description macros) <RP>:
	* tmac/groff_ms.7.man (Document description macros) <RP>:
	Document them.

	* NEWS: Add item.

2022-07-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Rename register `cov*rp-no` to
	`cov*rp-no-repeat-info`.

2022-07-08  Deri James  <deri@chuzzlewit.myzen.co.uk>

	* font/devpdf/util/BuildFoundries.pl (LocateFile): Some systems
	store .afm files in a parallel directory to the Type 1 files,
	restore original path after checking for parallel directory.

2022-07-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am (font/devpdf/download): Call
	"BuildFoundries" with new `--strict` option so that the build
	fails if the AFM files for the URW fonts can't be found.

2022-07-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl: Add Boolean-valued scalar
	`beStrict` (defaults false) and new command-line option
	`--strict` to make it true.
	(LoadFoundry): Check return value of subroutine `LocateAF`.
	Emit diagnostic if it is null, as a warning if not "strict", and
	fatal if so.

2022-07-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am (font/devpdf/util/BuildFoundries): Add
	dependency on "afmtodit" since "BuildFoundries" calls this
	program when generating groff font description files from URW
	fonts.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Fix Savannah #62690.

	* tmac/s.tmac (P1, SC, UC, P2): Drop undocumented support for
	document-private macros used by Kernighan & Cherry's
	"Typesetting Mathematics -- User's Guide (Second Edition)".

	Fixes <https://savannah.gnu.org/bugs/?62690>.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Fix Savannah #62688.

	* tmac/s.tmac (DE): Set no-space mode when ending displays.
	(@EN): Set no-space mode after outputting the display distance
	so that it doesn't combine with inter-paragraph space.

	Fixes <https://savannah.gnu.org/bugs/?62688>.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Regression-test Savannah #62688.

	* tmac/tests/s_no-excess-space-around-displays.tmac: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Fix Savannah #62687.

	* tmac/s.tmac (@MC): Honor `MINGW` register even when setting
	only two columns, as clearly implied by our documentation.

	Fixes <https://savannah.gnu.org/bugs/?62687>.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Regression-test Savannah #62687.

	* tmac/tests/s_honor-MINGW-when-two-columns.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Fix Savannah #62686.

	* tmac/s.tmac (@MC): Set no-space mode before doing a paragraph
	reset, not after: we don't want vertical space at the top of the
	first column when entering multi-column mode, because then it
	doesn't align with the tops of subsequent columns.

	Fixes <https://savannah.gnu.org/bugs/?62686>.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Regression-test Savannah #62686.

	* tmac/tests/s_mark-column-start-correctly.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (IX): Drop.
	* NEWS: Add item.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Add "sorry" implementations for documented but
	unsupported Unix Version 7 ms macros.  This way it's easier to
	tell when a historical document needs one and this case is
	distinguishable from a document-private macro warned about with
	"groff -w mac".

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (UX): Drop undocumented support for this macro.
	This implementation isn't consistent with historical ones, which
	identified the trademark holder.  But doing that is a problem,
	so just stop trying to cope.  Also, spelling Unix in full caps
	was an imposition by the AT&T legal department on the CSRC.

	"The name Unix is a trademark, originally owned by Bell Labs and
	subsequently traded off like a baseball card among a number of
	companies." -- Ben Klemens

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Replace incomplete documentation of unimplemented macros.

	* doc/groff.texi (Missing ms Macros):
	* doc/ms.ms (AT&T ms macros not appearing in groff ms): Drop,
	replacing with...

	* doc/groff.texi (Unix Version 7 ms Macros Not Implemented by
	groff ms):
	* doc/ms.ms (Unix Version 7 ms macros not implemented by groff
	ms):
	* tmac/groff_ms.7.man (Unix Version 7 macros not implemented by
	groff ms): ...these.

2022-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_translate): Throw an error
	diagnostic when the user attempts to translate space characters.
	{By contrast, translating _to_ [unbreakable, unadjustable]
	spaces is an old troff hack often seen as ".tr ~ ", and largely
	superseded by groff's "\~" escape sequence, now widely supported
	by other troffs.}

	Fixes <https://savannah.gnu.org/bugs/?60803>.  Thanks to T. Kurt
	Bond and Oliver Corff for the report.

2022-07-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/pipeline.c: Refactor.  Drop function rename via
	preprocessor macro usage.  Declare and define `c_error` by its
	correct name.
	(run_pipeline): Update call sites.  Stop flushing standard error
	stream after calling libgroff's `error` function (which
	`c_error` wraps); libgroff already guarantees this operation.

2022-07-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (abort_request): Flush the standard
	error stream before exiting, to improve chances of user seeing
	any message as arguments to the `ab` request.

2022-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp
	(char_buffer::run_output_filter): Die if platform supports
	neither `fork()` nor `spawn()` for child process creation.

2022-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (cleanup): Add function to tidy
	memory before exiting.
	(main): Register aforementioned function with `atexit()`.  Die
	if registration fails.

2022-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (do_file): Die if `fclose()`
	fails; such a situation suggests a pretty hosed environment.

2022-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (checkImageDir): If `mkdir()`
	fails, use `strerror()` to report the underlying problem.

2022-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp: Refactor.  Drop unnecessary
	prototype for static function.  Use idiomatic C++98 null pointer
	constant.  Annotate it as null pointer to ease any future
	migration to ISO C++11.  Boolify.  Use C++98 bool data type
	instead of preprocessor macros `TRUE` and `FALSE`.  Demote some
	global Boolean variables from `int` to `bool` and rename some to
	be more clear: `show_progress` -> `want_progress_report`;
	`debugging`; `eqn_flag` -> `need_eqn`.
	(make_message): Rename this...
	(make_string): ...to this.  Align more closely with contemporary
	version of example from Linux man-pages printf(3) page.  Use
	`vsnprintf()` to determine size of memory buffer needed prior to
	allocation instead of iteratively growing it until it is large
	enough.  Always die if `vsnprintf()` fails: this function now
	always returns a valid pointer if it returns at all.
	(makeFileName, setupAntiAlias, imageList::createPage,
	imageList::createImage): Update call sites to use
	`make_string()`.
	(char_buffer::can_see): Demote return type from `int` to `bool`.
	(char_buffer::skip_spaces): Drop unused member function.
	(char_buffer::read_file, makeTempFiles): Demote return type from
	`int` to `void`.  Stop returning after calling functions that
	don't return.
	(char_buffer::read_file): Call `sys_fatal()` if `fread()`
	returns an error, similarly to other calls into the standard C
	library that this file makes.  Improve check for error from
	`fread()` by not regarding a return value of zero when the
	end-of-file indicator is set as an error condition.
	(makeFileName, checkImageDir, char_buffer::run_output_filter,
	scanArguments): Call `fatal()` instead of `error()` and then
	`exit(1)`.
	(makeFileName, scanArguments): Dismiss Shlemiel the Painter:
	save return value of `strlen()` and call `strcpy()` multiple
	times instead of mixing `strcpy()` and `strcat()`; the latter
	approach rescans the string unnecessarily.
	(char_buffer::run_output_filter): Stop passing unnecessary null
	pointer argument to diagnostic message functions.  Stop calling
	`fflush()` after libgroff diagnostic function, which always
	{ultimately} flushes the standard error stream itself.
	(makeTempFiles, do_file, main): Boolify.
	(makeTempFiles, do_file): Reorder null pointer equality
	comparisons to avoid inadvertent lvalue assignment.
	(scanArguments, main): Use `EXIT_SUCCESS` and `EXIT_FAILURE`
	constants from C library instead of integer literals for exit
	status.
	(do_file): Demote return type from `int` to `bool`.  Return
	Boolean literals.  Drop conditional with empty consequent.
	(main): Declare local variables closer to the points of use.
	Stop trying to be a register allocator: stop reusing loop index
	variable `i` as integer storage for another (albeit related)
	purpose; introduce `operand_index` instead.  Clarify logic by
	splitting combined initialization and comparison operations, and
	by testing function return value directly instead of storing it
	in a pointless temporary.  Use `EXIT_SUCCESS` and `EXIT_FAILURE`
	constants from C library instead of integer literals for exit
	status.

2022-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (run_commands): Trivially refactor.
	Rename variable for clarity; add comment.

2022-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp
	(char_buffer::run_output_filter): Return wait status of child
	process.
	(char_buffer::run_output_filter, main): Rename local variable
	`status` to `wstatus` to recognize distinction between exit
	status (a 7-bit quantity) and wait status (a wider type).
	(main): Issue fatal diagnostic if child process exited with
	nonzero status.  Since the child's output to the standard error
	stream is lost, advise re-running with different output driver
	to see them.  This unhappy shortcoming is filed as Savannah
	#62673.  Explicitly return zero otherwise.

	Fixes <https://savannah.gnu.org/bugs/?60782>.

2022-06-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/ab_works.sh: Add regression test for
	Savannah #60782.

2022-06-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Trivially refactor.

	* src/roff/troff/input.cpp (token::next): Rename statement label
	to use documentary terminology.
	* src/roff/troff/node.cpp (make_composite_node)
	(make_glyph_node): Make functions static since nothing outside
	this translation unit calls them.
	* src/roff/troff/node.cpp (make_glyph_node): Refactor optional
	argument and its usage.  Put it down, flip it, and reverse it.
	That is, demote its type from `int` to `bool`, invert its sense,
	and rename it since it affects warning, not error, diagnostics.
	(character_exists): Update only call site of `make_glyph_node()`
	that uses non-default argument value.

2022-06-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Adjust diagnostic message text to clarify and better
	match terminology used in documentation.

	* src/roff/troff/input.cpp (set_escape_char, do_overstrike)
	(do_bracket, do_name_test, do_width, do_special):
	* src/roff/troff/node.cpp (suppress_node::tprint): Migrate from
	"escape" to "escape sequence".

	* src/roff/troff/node.cpp (make_composite_node)
	(make_glyph_node): Clarify what went wrong.

	* src/roff/troff/input.cpp (token::get_char)
	(check_missing_character): Migrate from "normal character" to
	"ordinary character" (see groff_char(7)).

2022-06-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Rename a function for clarity.

	* src/roff/troff/input.cpp (add_to_node_list): Rename this...
	(add_to_zero_width_node_list): ...to this.
	(do_zero_width): Update call site.
	* src/roff/troff/token.h: Update declaration.

2022-06-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (handle_unknown_desc_command):
	Refactor to skip unnecessary string comparisons.  We explicitly
	return in the final case instead of falling off the end of this
	void function for consistency if additional cases are added.

2022-06-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (handle_unknown_desc_command):
	Partially revert commit 64dc40d23a, 19 June.  I forgot to save
	and restore the previous values of the globals
	`current_filename` and `current_lineno`, and, noticing that this
	function has 3 return paths, decided that it's cheaper just to
	go back to `error_with_file_and_line()`.

2022-06-21  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Add more search paths to the Foundry file.

	* font/devpdf/Foundry.in: Use the directory specified with the
	config flag --with-urw-fonts-dir to populate the default foundry
	as well as the U foundry. Important to populate the download
	file with font files to embed the fonts not part of the base
	pdf fonts or if user wants all fonts embedded.

2022-06-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (UR, MT): Fix problem with hyphenation
	occurring before the end of the line when the line length was
	not the device default (common for man pages at the terminal)
	and hyperlinks were enabled.  The issue is that the new
	environment we created inherits the default environment's line
	length (its state at troff initialization, prior to macro
	package loading and configuration).  This latent issue was
	exposed by post-groff 1.22.4 changes to enable the hyphenation
	of link text and add the hyperlink feature.  Fix it by copying
	the line length at the time the macro is called, which is
	necessarily after man(7) sets up the line length, to the new
	environment.

2022-06-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/psrm.cpp (resource_manager::output_prolog):
	(resource_manager::supply_resource):
	(resource_manager::read_download_file): Update diagnostic
	message language and report underlying problem encountered by
	system when failing to open files.  This will probably be the
	text for ENOENT in most cases, but should help avoid frustration
	in those where it isn't.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/psrm.cpp
	(resource_manager::read_download_file): Align diagnostic message
	wording with gropdf in the same circumstance.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Throw warning in font category when a font selection
	escape sequence is used after the output line continuation
	escape sequence on an input line, because it is ignored.

	* src/roff/troff/env.cpp (environment::set_font): Do it.

	* doc/groff.texi (Warnings):
	* src/roff/troff/troff.1.man (Warnings): Document it.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (font_change): Boolify.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (LoadFont): Revise error message
	when a font can't be found for embedding.  User failure to add
	an entry for locating the font file seems a more likely scenario
	than outright corruption of the file.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (font_change): Warn upon selection of a
	nonexistent font name.

	Fixes <https://savannah.gnu.org/bugs/?62656>.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Revise `environment::set_font` to return Boolean value
	indicating success of font selection operation.

	* src/roff/troff/env.cpp (environment::set_font):
	* src/roff/troff/env.h (environment::set_font): Do it.

	This prepares the way for a fix for Savannah #62656.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp: Use single exit path, freeing
	memory allocated for strings.
	(xexit): Add `exit()` wrapper; free allocated memory.
	(main): Use it in all three exit paths.

2022-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp: Refactor to be more meticulous with
	memory.  Add globals `saved_path`, `groff_bin_path`, and
	`groff_font` to store pointers into the process environment
	returned by `putenv()`; once used, they need to remain valid for
	the lifetime of the program.
	(xstrdup): Add `strdup()` wrapper: dies if `strdup()` fails.
	(main): Split nested `strsave()` and `xputenv()` (until recently
	`putenv()`) calls.  Free duplicate strings prior to exit.

2022-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (main): Rename temporary variable to
	avoid shadowing one in enclosing scope, which can lead to
	cut-and-paste errors (ask me how I know).

2022-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp: Slightly refactor to indirect
	`putenv` calls through an error-checking wrapper.
	(xputenv): Add new function to die if `putenv()` fails.
	(main): Update call sites to use it.

2022-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[groff]: Add information to diagnostic messages.

	* src/roff/groff/groff.cpp (main): Report underlying system
	error if `putenv()` fails.
	(handle_unknown_desc_command): Set globals `current_filename`
	and `current_lineno` from `filename` and `lineno` arguments
	passed to us to we can use the simpler interface of `error()`
	rather than `error_with_file_and_line()`.

2022-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Update return type of `font::load_desc` function to
	enable more informative diagnostics from callers.

	* src/include/font.h (font::load_desc): Change return type from
	`bool` to `const char` pointer.
	* src/libs/libgroff/font.cpp (font::load_desc): Return null
	pointer literal on failed `open()` or validation failures.
	Return filespec on success.

	* src/libs/libdriver/input.cpp (do_file):
	* src/preproc/grn/main.cpp (getres):
	* src/roff/groff/groff.cpp (main):
	* src/roff/troff/input.cpp (main): Compare `font::load_desc()`
	return value to null pointer literal instead of treating it as a
	Boolean.

	* src/roff/groff/groff.cpp (main): Report full filespec of
	troublesome "DESC" file when complaining of missing "postpro"
	directive.

2022-06-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp: Add new Boolean global,
	`need_postdriver`, and initialize it true.
	(main): Make `need_postdriver` false if the `-X` or `-Z` options
	are given.  Test it later.  This prevents groff from exiting
	with a fatal error if an output driver is not available, but
	also not required.  Also reorder null pointer equality
	comparison to avoid inadvertent lvalue assignment.

	Fixes <https://savannah.gnu.org/bugs/?62640>.

2022-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (help): Revise usage message for
	expressiveness and clarity.

2022-06-21  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Correct display of pathnames used.

	* font/devpdf/util/BuildFoundries.pl: Convert array to
	string of pathnames.

2022-06-21  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Fix to gropdf.

	* src/devices/gropdf/gropdf.pl: If pdfbookmark was called
	within 5p of top of page (e.g. straight after a .bp when
	\n[nl] was zero) the click destination would be off by a
	page.

2022-06-19  Ingo Schwarze <schwarze@openbsd.org>

	* font/devpdf/devpdf.am: Always build PDF font description
	files.

	Build font/devpdf/download and the various TR, TB, CR etc.
	files in the same directory even when they are not required
	by the build because USE_GROPDF is unset, usually because
	ghostscript is either unavailable or deliberately disabled
	by the person running the build.  These files need to be
	built and installed anyway, and can be used on the target
	system when the required infrastructure is available at run
	time.

2022-06-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Revise introduction of vertical spacing concept to avoid
	render inference that the formatter will compute a vertical
	spacing appropriate to the type size automagically--it will not.

	Fixes <https://savannah.gnu.org/bugs/?62617>.  Thanks to Dave
	Kemper for the report.

2022-06-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Revise discussion of end-of-sentence detection.

	* doc/groff.texi (Filling):
	* man/roff.7.man (Concepts): Do it.  "Spaces" is a now a term
	with a much more restricted usage.  Emphasize the input context,
	now explicitly identified as plain text files with Unix line
	endings.

	Fixes (one hopes) <https://savannah.gnu.org/bugs/?62593>.
	Thanks to Ingo Schwarze for the report and Dave Kemper for the
	discussion.

2022-06-10  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Changes to BuildFoundries.

	* font/devpdf/util/BuildFoundries.pl: Collect search paths into
	an array rather than a colon delimited string, this allows
	the @PATH_SEPARATOR@ character (':' or ';') to be used to
	delimit paths yielded by the command 'gs -h' but still use ':'
	to delimit paths in the Foundry file. This means the same
	Foundry file can be used on all systems.

	* font/devpdf/Foundry.in: Add more likely paths to find the URW
	fonts.

2022-06-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Weaken dependency on TeX, instead using it (to generate
	the DVI and PDF forms of our Texinfo manual) only if it is
	available.

	* m4/groff.m4 (GROFF_USE_TEX_CHECK): Check for presence of 'tex'
	executable in path.  Set shell variable `groff_use_tex` to "yes"
	if present, and "no" otherwise.  This check runs only if the
	'makeinfo' and 'texi2dvi' version checks have already passed.

	* configure.ac: Run the new check.  Set Automake conditional
	`USE_TEX` only if shell variable `groff_use_tex` is "yes".
	Report whether "groff.dvi" and "groff.pdf" are (re-)buildable.

	* doc/doc.am: Parameterize names of groff.{dvi,pdf} targets as
	Make macros `GROFF_DVI` and `GROFF_PDF`.  Define them only if
	`USE_TEX`.  Do _not_ update `EXTRA_DIST` macro; leave the
	literal file names there because we require that distribution
	archives contain these files.
	(.texi.dvi, .texi.pdf): Update suffix rules to check `USE_TEX`
	and fail, complaining of missing 'tex' program, if these targets
	are attempted without it being true.  Only manually specifying
	the file names as targets to 'make' or attempting to generate a
	distribution archive without TeX present should cause these
	errors.

	* INSTALL.REPO: Update dependency information.

	Fixes <https://savannah.gnu.org/bugs/?62592>.  Thanks to Deri
	James for the report.

2022-06-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (.texi.dvi, .texi.pdf, $(DOC_GNU_EPS)): Quote names
	of programs when aborting because they're missing.

2022-06-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PROG_MAKEINFO, GROFF_PROG_TEXI2DVI):
	Largely revert commit d5013ededc, 21 May: run checks for
	'makeinfo' and 'texi2dvi' programs regardless of presence of
	".tarball-version" file.  Their presence is a necessary (but not
	sufficient) condition for refresh of formatted forms of our
	Texinfo manual if the source is modified.

	Begins addressing <https://savannah.gnu.org/bugs/?62592>.

2022-06-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Rename some groff Autoconf macros to better match
	Autoconf's own naming conventions.

	* m4/groff.m4 (GROFF_MAKEINFO): Rename to...
	(GROFF_PROG_MAKEINFO): ...this.
	(GROFF_TEXI2DVI): Rename to...
	(GROFF_PROG_TEXI2DVI): ...this.

	* configure.ac:
	* m4/groff.m4 (GROFF_TEXI2DVI): Update call sites.

2022-06-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (SH, SS, B, I, SM, SB): Set input trap with `it`
	instead of `itc` for better Unix Version 7 man(7) compatibility.

	Fixes <https://savannah.gnu.org/bugs/?51468>.  Also see
	discussion at
	https://lists.gnu.org/archive/html/groff/2022-06/msg00020.html
	et sequentia (amid a vigorous bikeshedding of `\&`'s name).

2022-06-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Regression-test use of input traps.

	* tmac/tests/an_use-input-traps-correctly.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-06-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (LoadDesc): Validate device
	description file for essential directives and acceptable values
	as grops(1) does.

2022-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff, grohtml, grops, grotty]: Update wording of diagnostic
	messages to refer to "motion quantum" rather than "resolution"
	where appropriate.

	* src/devices/grohtml/post-html.cpp
	(html_printer::html_printer):
	* src/devices/grops/ps.cpp (ps_printer::ps_printer):
	* src/devices/grotty/tty.cpp (tty_printer::set_char)
	(tty_printer::add_char, tty_printer::end_page):
	* src/roff/troff/env.cpp (line_length, title_length): Do it.

2022-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl: Do more "DESC" file validation.
	(LoadDesc): Bomb out gracefully if any of "unitwidth", "res", or
	"sizescale" missing from "DESC" file.  This prevents Perl
	warnings about use of uninitialized values, and undoubtedly
	mangled output.

2022-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl: Revise diagnostic message
	handling.
	(top level): Add new scalar `progname` to house executable name.
	(Msg): Output messages in format recommended by GNU Coding
	Standards manual.  Identify who's talking (Savannah #52463).
	Rename `lev` scalar to `fatal` since it is used only as a
	Boolean for immediately exiting with failure status.  Report
	diagnostic severity as part of message.
	(Warn, Die): Add new subroutines through which all diagnostics
	are now emitted.
	(top level): Migrate a use of Perl `die` builtin to our `Die`.
	(top level, ToPoints, LoadDownload, LoadDesc, do_x, GetPoints,
	LoadSWF, LoadPDF, LoadStream, BuildStream, ParsePDFHash,
	LoadFont, GetType1, GetChunk, RemapChr, do_N): Migrate `Msg(0,
	...)` calls to `Warn` and `Msg(1, ...)` to `Die`.  Begin
	messages in lowercase (GNU Coding Standards).  Recast a few
	messages for clarity.

	Continues the long process of fixing Savannah #52463.

2022-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (Load_Config): Drop unused
	subroutine and its commented-out call site, which came in that
	way in July 2011.

2022-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (LoadFont): Warn if a font to be
	embedded in PDF output cannot be located in the "download" file.

	Fixes <https://savannah.gnu.org/bugs/?62572>.  Thanks to Deri
	James.

2022-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/a4.tmac: Drop file from distribution.  It has been
	superseded by papersize.tmac for nearly 20 years.
	* tmac/tmac.am (TMACNORMALFILES): Delete reference.
	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?62569>.

2022-06-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Parameterize X11-related man pages, so they don't get
	spuriously generated (and not cleaned) when building with X11
	support disabled.

	* Makefile.am (.man): Fix logic nit: drop unnecessary removal of
	target before clobbering it with sed.
	* src/devices/xditview/xditview.am (GXDITVIEW_MAN1): Add new
	macro, expanding to nothing if `WITHOUT_X11` and to the target
	name otherwise.
	(man1_MANS): Append `GXDITVIEW_MAN1` expansion, not a literal.
	* src/devices/xditview/xditview.am (XTOTROFF_MAN1): Add new
	macro, expanding to nothing if `WITHOUT_X11` and to the target
	name otherwise.
	(man1_MANS): Append `XTOTROFF_MAN1` expansion, not a literal.
	* doc/doc.am (GROFF_MAN_PAGES1): Append foregoing expansions
	instead of literals.

2022-06-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Add `AM_CONDITIONAL`: `HAVE_URW_FONTS`, so our
	Automake files can more easily cope with their absence.
	* font/devpdf/Foundry.in: Add easily matched phrases to
	comments, to clearly delimit the URW foundry portion of the file
	so it can be omitted if those fonts are absent.
	* font/devpdf/devpdf.am (font/devpdf/Foundry): Generate file
	differently depending on `HAVE_URW_FONTS`; keep the existing
	procedure if true, and delete the URW section from the generated
	file otherwise, avoiding diagnostic messages from afmtodit(1)
	and our BuildFoundries script.

	Fixes <https://savannah.gnu.org/bugs/?62570>.

2022-06-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am (font/devpdf/util/BuildFoundries):
	Generate script using the `PATH_SEPARATOR` Automake macro.
	* font/devpdf/util/BuildFoundries.pl: Add `pathsep` scalar to
	house the build-time path separator.
	(LocateFile): Use it.
	(LoadFoundry, CheckFoundry): Stop using spaces as part of the
	path separation delimiter.  It is not idiomatic.

2022-06-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Explicitly identify poppler tools in report.

2022-06-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl: Trivially refactor.  Drop
	unused hash `foundry`.  Drop scalar `warn` that was set and
	updated but never tested.

2022-06-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl: Alter script to write to
	the standard output stream instead of (re)writing a file named
	"download" in the current working directory.  This recovers from
	a problem I introduced in commit 6e62be835d, 2 May, as an
	unforeseen side effect of improving build parallelism so that
	the "download" file wouldn't be read until it was fully
	populated.  As a side benefit, this approach is more Unixy, and
	less dependent on $PWD.
	(top level): Stop calling `WriteDownload` with an argument.
	(LoadFoundry): Close only the file handle of interest when done,
	not all of them (including `STDOUT`, which we now need).
	(CheckFoundry): Same--just for cleanliness, since at present
	running the script in 'check' mode doesn't write to any streams.
	(WriteDownload): Stop taking an argument and manipulating file
	handles.  Write download file to standard output.
	(LoadDownload, WriteDownload): Drop `top` scalar, used as a
	mutex to serialize read and write access to "download" file; it
	is no longer needed since the "download" file is now only read.

2022-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Rename shell variables and Autoconf/Automake macros of
	Boolean sense to have names more like logical predicates and
	avoid doofy "DONT" nomenclature.

	* m4/groff.m4 (GROFF_MAKE_RM): Rename shell variable
	`groff_is_rm_defined` to `groff_make_defines_rm` (purely for
	clarity; it already had a good name).
	(GROFF_MAKE_RM): Rename this...
	(GROFF_MAKE_DEFINES_RM): to this, to make parallelism obvious,
	and enabling...
	* configure.ac: ...rename of `MAKE_DONT_HAVE_RM` to
	`MAKE_DEFINES_RM` with sense of test reversed.  Also interpolate
	`GROFF_MAKE_DEFINES_RM` instead of `GROFF_MAKE_RM`.  This in
	turn enables...
	* Makefile.am: ...revision of conditional from
	`MAKE_DONT_HAVE_RM` to "!`MAKE_DEFINES_RM`".

2022-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS_PATH)
	(GROFF_WITH_COMPATIBILITY_WRAPPERS, GROFF_APPDEFDIR_OPTION)
	(GROFF_UCHARDET): Recast help strings to more closely parallel
	structure and style of Autoconf's own help strings.
	(GROFF_WITH_COMPATIBILITY_WRAPPERS): Recast to tighten wording.

2022-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac:
	* m4/groff.m4 (GROFF_APPDEFDIR_OPTION, GROFF_APPDEFDIR_DEFAULT)
	(GROFF_APPDEFDIR_CHECK): Rename m4 macros and shell variable
	from "*appres*" to "*appdef*.  Update interpolation sites.

	* configure.ac:
	* m4/groff.m4 (GROFF_APPDEFDIR_CHECK): Further rename this...
	(GROFF_APPDEFDIR_NOTICE): ...to this, for consistency with other
	post-report output macros.

	* Makefile.am:
	* PROBLEMS:
	* doc/automake.mom:
	* src/devices/xditview/xditview.am: Update interpolation sites
	of `appresdir`.

	* Makefile.am:
	* src/devices/xditview/gxditview.1.man:
	* src/roff/groff/groff.1.man: Update interpolation sites of
	`APPRESDIR`.

	* NEWS: Add item.

2022-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_X11, GROFF_UCHARDET): Drop redundant
	messages (which are easily overlooked amid the torrent of
	"checking" output anyway).  Discovery failures of X11 and the
	uchardet library are already parts of the configuration report
	at or near the end of output.

2022-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PNMTOPS_NOSETPAGE): Partially revert change
	from 21 May and document why in a comment.

2022-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/troffrc: Skip loading of "papersize.tmac" if not in troff
	mode.

	Fixes <https://savannah.gnu.org/bugs/?62238>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-05-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Report use of "g" prefix for commands and macro
	package compatibility wrappers.
	* m4/groff.m4 (GROFF_G): Fix code style nits.  Update
	indentation to match recent practice.

2022-05-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Fix code style nits and tweak report.  Stop
	superfluously using braces for shell parameter expansions that
	don't require them.  The shell is not make(1).  Say
	"installation _directory_ prefix" since another kind of prefix
	can be used by groff (the "g" in front of command and macro
	package names shared with AT&T troff).

2022-05-31  Dave Kemper <saint.snit@gmail.com>

	* doc/groff.texi: Fix content and style nits.
	  - Remove redundancy ("fixed-width... character that can't be
	    adjusted").
	  - Fix incorrect word ("environment value" -> "environment
	    variable").
	  - Add or change the placement of a couple tie{}s to comport
	    with style-guide recommendation.
	  - Grammarify.
	  - Clarify and tighten wording.

	Fixes <https://savannah.gnu.org/bugs/?62551>.

2022-05-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/node.cpp (font_position): If mounting a font
	fails and a third argument was given (to the `fp` request),
	report its value in the diagnostic message.  This could reveal a
	prohibited attempt at directory traversal.  See commit
	a891161bc9, 7 November.

2022-05-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/fontfile.cpp (font::open_file): Refactor.
	Move more logic, including memory allocation, inside conditional
	that accepts only file names without '/' characters, skipping
	unnecessary work in the alternative.  Annotate use of zero
	literals as null pointers to ease any future migration to ISO
	C++11.  Add 'const' qualifier to variable that doesn't require
	modification (and which is used in the LHS of an equality
	comparison, so that clumsy operator misuse will provoke a
	compiler warning).

	Fixes <https://savannah.gnu.org/bugs/?62532>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-05-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: In configuration report, say that we're
	reporting compiler options along with the compiler executable.
	Fix leftover test(1) comparison with garbage, overlooked in
	commit faa22d89d2, 20 May.

2022-05-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/meintro_fr.ps): Build with '-t' option.

	Fixes <https://savannah.gnu.org/bugs/?62542>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-05-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.1.man (Options) <-l>: Handle case where
	no default print spooler is configured, and report formatter
	behavior correctly if it isn't.

	Fixes <https://savannah.gnu.org/bugs/?62535>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-05-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am (.man): Process '@PSPRINT@' substitutions with
	"makevarescape.sed".

2022-05-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PROG_YACC, GROFF_MAKEINFO, GROFF_TEXI2DVI):
	Fix logic error in detection of build scenario: the presence of
	a ".git" directory is not an indicator that we're not building
	from a distribution archive, because we might be building from a
	snapshot archive (which also lacks it).  Instead, perform checks
	required only by builds from Git checkouts and snapshot archives
	if the ".tarball-version" file is not present.

2022-05-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am (EXTRA_DIST): Ship "HACKING" file.

2022-05-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* bootstrap.conf: Add "pkg-config" to `buildreq`.  Not having it
	causes pretty horrible macro expansion problems and diagnostics
	when 'autoreconf' is run; they're still pretty bad even if you
	use `AC_REQUIRE` and `m4_pattern_forbid`.  So just demand it.

2022-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devps/S:
	* font/devps/symbolmap: Drop excess mapping of `*U` special
	character.  groff maps it to the Adobe Glyph List name
	'Upsilon1'.  (The AGL 'Upsilon' is a homoglyph of the Latin
	capital 'Y'.)
	* PROBLEMS: De-document build-time warning, now resolved.

2022-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.tables: Regenerate using Unicode
	14.0.  No substantive changes.

2022-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/make-afmtodit-tables: Refactor.  Drop
	unused variable `prog`.  Use value of `CPP` from environment (if
	defined) and use parameter expansion to apply a default if null
	or not set.  Use for loop to eliminate duplicative if statement.
	Test input files for readability, not just existence.  Use more
	portable test(1) and shell syntax.  Swap usage error and fatal
	error exit statuses; using "1" for failure and "2" for usage
	errors is more common in shell scripts I've seen.  Update usage
	message to put non-literal parameter in full caps, and clarify
	its name.  Update comment blocks written to generated files to
	further clarify data provenance.

2022-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PRINT): Refactor.  Stop performing checks
	for spooler options if none is available.  Stop redundantly
	reporting command name used for spooling PostScript files.  If
	an option is required for spooling DVI files, report it alone
	instead of repeating the command name as well.

2022-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Fix insensitivity of groff(1) man page to configured spooler.

	* Makefile.am (.man): Replace `@PSPRINT@` in man page sources
	with name of configured print spooler command.
	* src/roff/groff/groff.1.man (Options) <-l>: Use configured
	print spooler command instead of literal 'lpr'.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_UCHARDET_CHECK): Fix grammar nit in failure
	message when user demands uchardet support but the library
	cannot be located.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_CHECK_GROHTML_PROGRAMS): Fix logic error in
	computation of verb to be used in notice message.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PROG_YACC, GROFF_URW_FONTS_CHECK)
	(GROFF_WITH_COMPATIBILITY_WRAPPERS, GROFF_UCHARDET_NOTICE):
	Improve shell code portability.  Per the GNU Autoconf manual,
	"The -a, -o, '(', and ')' operands are not present in all
	implementations, and have been marked obsolete by Posix 2008.
	...portable uses of test should never have more than four
	arguments, and scripts should use shell constructs like '&&' and
	'||' instead."

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.1.man (Installation directories): Don't
	output a tagged paragraph for the X11 application defaults
	directory if the build symbol '@APPRESDIR@' is not defined (that
	is, we didn't build with X11 support).

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_GHOSTSCRIPT_VERSION_CHECK): Fix code style
	nits.  Use lowercase for shell variables we define.  Don't quote
	literal operands to test(1) that don't contain syntactically
	shell-significant characters.  Update indentation to match
	recent practice.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS_NOTICE): Don't emit the notice if
	Ghostscript isn't available, since it was a prerequisite for
	the `GROFF_URW_FONTS_CHECK` macro in the first place.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Add print spooler determination to configuration
	report.

	* m4/groff.m4 (GROFF_PRINT): Add shell variable
	`groff_have_spooler` to house the name of the print spooler
	{"lp" or "lpr"} or the word "no".
	* configure.ac: Report determined spooler, or its absence.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/tests/do-not-seek-the-unseekable.sh: Skip
	seekability check of the standard input stream if there is no
	controlling terminal.

	Fixes <https://savannah.gnu.org/bugs/?62506>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-05-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_CHECK_GROHTML_PROGRAMS): Migrate from
	`AC_FOREACH` to `m4_foreach` to avoid obsolescence warning from
	GNU Autoconf 2.70 or later.

	Fixes <https://savannah.gnu.org/bugs/?61059>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man: Rename "pilot" list macros for man(7) from
	`BL`/`EL` to `LS`/`LE`, per suggestion from Alejandro Colomar.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_MAKEINFO, GROFF_TEXI2DVI): Check for
	makeinfo(1) and texi2dvi(1) programs only if building from Git,
	not a distribution archive.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/meintro_fr.ps): Call groff with `-K utf8`
	instead of `-k`, in case the "configure" script didn't find
	uchardet (and preconv(1) thus can't auto-detect an encoding).

	Fixes <https://savannah.gnu.org/bugs/?59463>.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/tests/do-not-seek-the-unseekable.sh: Skip
	a check if /dev/stdin is not a character special device.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PDFTOOLS): Rename this...
	(GROFF_POPPLER): ...to this.
	* configure.ac: Update call site.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_UCHARDET_CHECK): Rename this...
	(GROFF_UCHARDET_NOTICE): ...to this.
	* configure.ac: Update call site.

	* m4/groff.m4 (GROFF_UCHARDET_NOTICE): Tighten wording of
	message reported to user.

	Fixes <https://savannah.gnu.org/bugs/?59481>.  Thanks to Dave
	Kemper for the report.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PNMTOOLS_CAN_BE_QUIET)
	(GROFF_PNMTOPS_NOSETPAGE): Skip check if prerequisite not met.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS_CHECK): Rename this...
	(GROFF_URW_FONTS_NOTICE): ...to this.
	(GROFF_URW_FONTS): ...and this...
	(GROFF_URW_FONTS_CHECK): ...to this.
	(GROFF_URW_FONTS_NOTICE): Give lengthy notice message a one-line
	summary.
	* configure.ac: Update call sites.

2022-05-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS): Refactor.  If our prerequisites
	are not met (availability of 'awk' and 'gs'), don't even run the
	check logic or print a "checking" message.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	Handle missing programs required to construct files needed at
	runtime by gropdf more gracefully.  Rename and refactor
	configuration-time logic to be more understandable.

	* configure.ac:
	* m4/groff.m4: Rename `GROFF_PDFDOC_PROGRAMS` macro to
	`GROFF_CHECK_GROPDF_PROGRAMS`.  Rename shell variable
	`make_pdfdoc` to `use_gropdf`.  Set it explicitly to "no" or
	"yes" instead of null or not null.

	* configure.ac:
	* m4/groff.m4:
	* doc/doc.am: Rename `BUILD_PDFDOC` to `USE_GROPDF`.

	* configure.ac: Call `GROFF_GROPDF_PROGRAM_NOTICE`.

	* doc/doc.am: Bracket definition of `PROCESSEDDOCFILES_PDF`
	macro and `$(PROCESSEDDOCFILES_PDF)` dependency declaration in
	Automake `if USE_GROPDF` conditional.  This prevents attempts
	to build PDF documents using groff that are doomed to fail.

	* m4/groff.m4: Refactor gropdf runtime-dependency program check.
	Split into two macros: one (`GROFF_CHECK_GROPDF_PROGRAMS`)
	performs the check, the other (`GROFF_GROPDF_PROGRAM_NOTICE`)
	issues a notice at the end of the configuration process if at
	least one program was not found.  Rename `docnote` shell
	variable to `gropdf_notice`.  Tighten wording of notice.  Drop
	unused `make_install_pdfdoc` and `make_uninstall_pdfdoc` shell
	variables.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	Handle missing programs required at runtime by grohtml more
	gracefully.  Rename and refactor configuration-time logic to be
	more understandable.

	* configure.ac:
	* m4/groff.m4: Rename `GROFF_HTML_PROGRAMS` macro to
	`GROFF_CHECK_GROHTML_PROGRAMS`.  Rename shell variable
	`make_htmldoc` to `use_grohtml`.  Set it explicitly to "no" or
	"yes" instead of null or not null.

	* configure.ac:
	* m4/groff.m4:
	* doc/doc.am: Rename `BUILD_HTML` to `USE_GROHTML`.

	* configure.ac: Call `GROFF_GROHTML_PROGRAM_NOTICE`.

	* doc/doc.am: Bracket definition of `PROCESSEDDOCFILES_HTML`
	macro and `$(PROCESSEDDOCFILES_HTML)` dependency declaration
	in Automake `if USE_GROHTML` conditional.  This prevents an
	attempt to build an HTML version of the "pic.ms" document that
	is doomed to fail (noisily).

	* m4/groff.m4: Refactor grohtml runtime-dependency program
	check.  Split into two macros: one
	{`GROFF_CHECK_GROHTML_PROGRAMS`} performs the check, the other
	{`GROFF_GROHTML_PROGRAM_NOTICE`} issues a notice at the end of
	the configuration process if at least one program was not found.
	Rename `html_docnote` shell variable to `grohtml_notice`.
	Tighten wording of notice.  Drop unused `make_install_htmldoc`
	and `make_uninstall_htmldoc` shell variables.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_GHOSTSCRIPT_VERSION_NOTICE): Add newline at
	end of buggy Ghostscript notification, so that the multiple
	possible lengthy notices after the configuration report have
	blank lines separating them.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	Check for m4 program at configuration time.

	* m4/groff.m4 (GROFF_PROG_M4): Define new macro to perform the
	check and error out if the program is missing.
	* configure.ac: Call the new macro.
	* tmac/tmac.am (tmac/groff_man.7.man)
	(tmac/groff_man_style.7.man): Use the new implicitly AC_SUBST-ed
	variable `M4` to run the program.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_PROG_YACC): Update wording of error
	message: we search for "yacc", so report it as missing if it is
	not found (along with "byacc" and "bison").

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Fix shell style nits.  Get rid of string
	{non-}nullity tests and comparisons involving concatenation with
	garbage (usually "x").  See 13 November entry regarding m4.  Use
	idiomatic shell "brace style" for control structures.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	Trivially refactor libgroff allocator configuration.

	* m4/groff.m4 (GROFF_USE_GROFF_ALLOCATOR): Update description of
	configuration flag to clarify that it's implemented in a
	library.  Rename shell variable to prefix it with "groff_",
	putting it in an ad hoc name space as with other variables.  If
	feature disabled, set variable to literal "no".
	* configure.ac: Use renamed variable and interpolate it directly
	into configuration report, simplifying shell logic.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Revise configuration report for intelligibility.
	Add report of C++ compiler and flags used: we compile much more
	C++ than C code so this seems appropriate.  Report Perl
	interpreter version so that we can collect build reports and
	turn the ratchet past Perl 5.6.1 at some point.  Fix X11
	"resources" misnomer (application defaults are what is meant).
	Rephrase generally.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am (EXTRA_DIST): Ship "ChangeLog.122" in distribution
	archive.  Overlooked in commit c11995df16, 19 February 2021.

2022-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tests/basic_latin_glyphs_map_correctly.sh:
	Fix portability problem: POSIX says that "od -c" (and "od -t c")
	are supposed to emit printing characters as defined by the
	underlying locale, but GNU coreutils od doesn't do this and
	macOS od does.  Set `LC_ALL` to "C" when running it to force
	3-digit octal reporting of characters with their eighth bit set.

	Fixes <https://savannah.gnu.org/bugs/?62357>.  Thanks to John
	Gardner for the report.  Also see <https://pubs.opengroup.org/\
	onlinepubs/9699919799/utilities/od.html>.

2022-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* INSTALL.extra (In Case of Trouble): Add advice on using the
	test suite, particularly if it fails.

	Fixes <https://savannah.gnu.org/bugs/?62478> (one hopes).

2022-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Input Line Traps):  Expand discussion.  The
	`it` and `itc` requests count neither input lines (strictly) nor
	text lines.  Instead, they count input lines that _directly
	produce formatted output_ (and, in the case of `itc`, are not
	"interrupted" or continued with the `\c` escape sequence).  This
	is useful--empty requests and requests that don't put nodes on
	the output don't break things--but does demand some explanation.
	Clarify and provide example.
	* man/groff.7.man (Escape sequence short reference) <it>: Sync.

2022-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (environment::choose_breakpoint): Tweak
	diagnostic message ("can't" -> "cannot").
	* doc/groff.texi (Breaking): Update example.

2022-05-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Copy Mode):
	* man/groff.7.man (Copy mode): Fix omission; `\?` is interpreted
	in copy mode.

2022-05-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (PT): Unclutter name space; remove
	`pg*saved-page-number-format` string when we're done with it.

2022-05-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Add unit tests, including one XFAIL for bad behavior.

	* src/preproc/tbl/tests/check-horizontal-line-length.sh:
	* src/preproc/tbl/tests/check-line-intersections.sh:
	* src/preproc/tbl/tests/check-vertical-line-length.sh:
	* src/preproc/tbl/tests/table-lacks-spurious-top-border.sh: Do
	it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run tests.
	(tbl_XFAIL_TESTS, XFAIL_TESTS): Expect one test failure.

2022-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tty.cpp (tty_printer::add_char): Modify
	diagnostic message: what gets written "above [the] first line"
	might not be a character (glyph) per se, but a line (rule) from
	a drawing command, and in fact the occurrence of these from
	boxed tables is the most common cause of this message I've seen.

2022-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Do more input validation.

	* src/devices/grotty/tty.cpp (tty_printer::draw): Throw warning
	if an unsupported geometric primitive is encountered.
	(tty_printer::line): Throw warning if a line is diagonal.  Die
	if length of a horizontal or vertical line is not a multiple of
	the appropriate motion quantum of the device (troff should never
	emit such nonsense, and currently doesn't appear to).

2022-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/tbl.1.man (Miscellaneous): Document GNU tbl's
	use of `#T` and `T.` registers.

2022-05-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_color_draw_node): Tweak
	diagnostic message to better distinguish drawing commands and
	device control commands.

2022-05-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Mitigate double-free problem exposed by malformed
	input.

	* src/roff/troff/mtsm.h (struct statem): Place member variable
	`issue_no` behind `DEBUGGING` preprocessor symbol, omitting it
	from production and ordinary development builds.
	* src/roff/troff/mtsm.cpp (no_of_statems): Place global variable
	behind `DEBUGGING` preprocessor symbol, omitting it from
	production and ordinary development builds.
	(statem::statem): Make constructor trivial if `DEBUGGING` not
	defined in preprocessor; it manipulates only `issue_no` and
	`no_of_statems`, which are synchronized.
	(statem::statem {copy}): Gate assignment of `issue_no` member
	variable from copy constructor behind `DEBUGGING` preprocessor
	symbol.
	(statem::flush, mtsm::inherit): Gate debugging output, already
	runtime-gated on `debug_state` symbol, of `issue_no` member
	variable, so that we don't reference it when it is not declared.

	See <https://savannah.gnu.org/bugs/?62040>.

2022-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Rename a test artifact; it's a bibliographic database
	file, not a refer(1) command file.

	* src/preproc/refer/tests/artifacts/62124.ref: Rename this...
	* src/preproc/refer/tests/artifacts/62124.bib: ...to this.
	* src/preproc/refer/refer.am (EXTRA_DIST):
	* src/preproc/refer/tests/report-correct-line-numbers.sh: Use
	new name.

2022-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/command.cpp (process_commands): Begin
	migration to use existing global variables for location reports
	in diagnostic messages.  Save current file name and line number
	before calling `command_loop()` and restore them afterward.
	Also decrement line counter before entering that loop because it
	would be too far advanced by one due to the final newline on a
	parsed input line.

2022-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.cpp (main): Report system error on
	`fflush()` failure.  POSIX Issue 5 a.k.a. SUSv2 (1997) specifies
	several possible `errno` values this C standard library function
	can set; see
	<https://pubs.opengroup.org/onlinepubs/007908799/xsh/fflush.html>.

2022-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Refactor: drop unused version of function (taking only
	a `const char *` parameter).

	* src/preproc/refer/command.cpp (process_commands): Drop
	definition.
	* src/preproc/refer/command.h (process_commands): Drop
	declaration.

2022-05-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.cpp (do_file): Fix another off-by-one
	line number reporting bug exposed by fix for Savannah #62391.

2022-05-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/tests/report-correct-line-numbers.sh: Add
	more regression tests.

2022-05-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Trivially refactor: boolify.

	* src/preproc/refer/command.cpp (input_stack::push_file): Demote
	and rename local variable from `int` to `bool`.
	(bol): Renamed from this...
	(is_at_beginning_of_line): ...to this.

2022-05-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Trivially refactor.

	* src/preproc/refer/command.cpp (input_stack::push_file):
	* src/preproc/refer/refer.cpp (do_file): Drop unnecessary
	construction of integer from integer (return type of `getc()`)
	in argument to error diagnostic functions; parallelizes with
	other diagnostic function calls.

2022-05-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/command.cpp: Refactor to simplify.
	(get_location): Demote return type from `int` to `void`.  The
	function only ever returned a `1` literal.
	(input_stack::error): Update call site to stop uselessly testing
	return value of `get_location()`.

2022-05-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (dist-info-bits, install_infodoc, dist-gnueps): Fix
	logic error.  When checking both source and build trees for
	files to copy, break after successfully copying the files, not
	after the first iteration of the loop unconditionally.  This
	caused the Info documents not to be installed from out-of-tree
	builds, and potentially would prevent them and doc/gnu.eps from
	being included in the distribution archive if for some reason
	they didn't build and that build failure were not treated as an
	error.  Problems introduced by me in commits e78bd20d54, 27
	March, and d79c3f3a4a, 11 November.

2022-05-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_APPRESDIR_OPTION): Update comments and
	human-readable output to (1) stop claiming that existing
	gxditview application defaults in the installation directory
	will be backed up; this is no longer true as of commit
	c66cb7725f, 3 April; and (2) refer to these files as
	"application defaults", not "resources".  (X11 application
	defaults are client-side and mandatory [for Xt-based programs];
	X resources are stored server-side and need not be configured to
	determine an X client's geometry and rendering.)

2022-05-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devX100-12/devX100-12.am (devX100_12_fontdir):
	* font/devX100/devX100.am (devX100_fontdir):
	* font/devX75-12/devX75-12.am (devX75_12_fontdir):
	* font/devX75/devX75.am (devX75_fontdir): Define macros without
	an extra "font/" layer in the directory hierarchy.

	Fixes problem introduced by me in commit 3c82cbbfe5, 27
	February.

2022-05-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am (font/devpdf/util/BuildFoundries): Spell
	dependency on `$(SH_DEPS_SED_SCRIPT)` using that macro expansion
	instead of a literal file name.  See doc/automake.mom.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/eqn.am (MAINTAINERCLEANFILES):
	* src/preproc/pic/pic.am (MAINTAINERCLEANFILES):
	* src/preproc/refer/refer.am (MAINTAINERCLEANFILES): Preserve
	byacc/bison output artifacts unless "maintainer-clean"ing.  Per
	the GNU Automake manual, "The intermediate files generated by
	yacc (or lex) will be included in any distribution that is made.
	That way the user doesn’t need to have yacc or lex."

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am: Stop manually handling "test-groff".  Per the
	GNU Automake manual, "If configure built it, then distclean
	should delete it."  This is taken care of automatically if we
	don't interfere.
	(BUILT_SOURCES, MOSTLYCLEANFILES): Drop "test-groff".

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/eqn.am (neqn): Produce temporary file first
	and set its permissions before moving it into place.  If
	anything in the future ever has a dependency on it, this avoids
	a race where the file exists, satisfying a dependency, but
	execution is attempted before its `x` permission bit is set.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Ensure that we install *.me source files, but don't
	include them in the distribution archive.

	* doc/doc.am (dist_otherdoc_DATA): Move `$(GENERATEDDOCFILES)`
	from here...
	(nodist_otherdoc_DATA): ...to here.
	(.PRECIOUS): Add `$(GENERATEDDOCFILES)` so that make(1) doesn't
	automatically remove "intermediate" objects in the .me.in -> .me
	-> .ps chain.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Handle "gnu.eps" file better.

	* doc/doc.am (GENERATEDDOCFILES): Remove `$(DOC_GNU_EPS)`.
	(EXTRA_DIST): Ship `$(DOC_GNU_EPS)` in distribution archive.
	($(DOC_GNU_EPS)): Simplify rule commands; stop trying to copy
	the file around since it will either be (1) in the distribution
	archive from which a build is performed; or (2) missing because
	a build is being done from Git, in which case we expect the PNM
	tools to be available.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (clean_otherdoc): Drop target: it doesn't seem to
	accomplish anything.
	(clean_infodoc): Drop target, moving its rules into...
	(maintainer-clean-local): ...this.  Drop deps, both gone now.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (distclean-local): Drop target: stop cleaning
	generated forms of our Texinfo manual with the "distclean"
	target.  They ship with the distribution archive and should
	remain in the tree even if the user needs to re-./configure.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Fix problems exposed by high build parallelism.

	* font/devpdf/devpdf.am (font/devpdf/util/BuildFoundries)
	(font/devpdf/DESC, font/devpdf/Foundry): Drop
	unnecessary removal of target prior to creating it.
	(font/devpdf/Foundry): Add creation of destination build
	directory as other targets do.
	(font/devpdf/download): Create dedicated target instead of
	lumping its generation under the stamp file.  Add missing
	dependencies on `$(DEVPDFFONTMAP_1)`, `$(DEVPDFFONTMAP_2)`,
	`font/devpdf/Foundry` and `font/devpdf/enc/text.enc`.  Remove
	now-unnecessarily complicated "forgery" of "GEN" line in quiet
	builds.  Tweak format of comment written to "download" file to
	make field identities clearer.  Construct output (with multiple
	shell commands) in temporary file so it is not read prematurely
	by the "BuildFoundries" script.  Move target into place as the
	last step.
	(font/devpdf/stamp): Relocate target to follow its dependencies.
	Add dependency on "font/devpdf/download".

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Tweak diagnostic messages in BuildFoundries script.

	* font/devpdf/util/BuildFoundries.pl (LoadFoundry)
	(WriteDownload, CheckFoundry): Recast for specificity and
	consistent style.
	(Die): Stop reporting line number with fatal errors; none of the
	call sites are parsing input.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Fix off-by-one error in line number for some
	diagnostics.

	* src/preproc/refer/command.cpp (input_item::get_location):
	Decrement reported line number by one after looping over input
	so that we report the line number as it was before the last
	newline character seen.  This off-by-one error was partially
	masked by...
	* src/preproc/refer/refer.cpp (do_file): ...initialization of
	`current_lineno` to zero.  However, for syntax problems (as
	opposed to the semantic problems of refer(1) command
	processing), this could result in complaints about the line
	number before they occurred, even on "line zero".  Initialize
	the variable to 1.

	Fixes <https://savannah.gnu.org/bugs/?62391>.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/tests/report-correct-line-numbers.sh: Add
	regression test for Savannah #62391.

2022-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/tfmtodit/tfmtodit.cpp (usage): Tweak usage message.
	Condense `-v` and `--version` into a single output line with
	brace and pipe notation, which we do not use in our man pages,
	but consistently do in our usage messages.  Use lowercase for
	option arguments since they are separated from option flag
	letters by space.  Call `fprintf()` once instead of 3 times.

2022-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.cpp (main): Tweak wording of
	diagnostic messages to refer to options consistently and to
	characterize input as "invalid" rather than "bad".
	(usage): Document --version option.  Use more informative
	metasyntactic variable names.  Organize usage message
	consistently with our others, and stop wrapping the output
	lines: we know neither the width of the terminal nor the length
	of the `program_name` string we're interpolating.  See commit
	b4de44f0, 19 July 2021.

2022-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (string_iterator::backtrace): Fix
	spurious output when `mac.filename` is empty.  Provoked by:
	  $ printf '\\(' | troff -b

2022-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.cpp: Trivially refactor.  Demote
	global variable `recognize_R1_R2` from integer to Boolean.
	(main, do_bib): Give expressions to `assert()` meaningful
	content.
	(is_list): Demote return type from `int` to `bool`.
	(do_file): Demote and rename integer local variables
	`start_of_line` to Boolean `at_start_of_line`.
	(is_list, do_file): Reorder equality comparisons to avoid
	inadvertent lvalue assignment.

2022-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Reduce and rationalize in-tree document dependencies.
	This eliminates spurious rebuilds of numerous documents
	{including the 380+-page groff-man-pages collections}.  It also
	fixes missing dependencies when using the build's groff to
	generate PostScript documents.

	* .gitignore: Drop old name of devpdf stamp file.
	* doc/.gitignore: Drop now-unused "example.stamp" file.
	* doc/doc.am (PROCESSEDDOCFILES_HTML, PROCESSEDDOCFILES_PDF)
	(PROCESSEDDOCFILES_TXT): Add new macros grouping targets by the
	format/output driver used to produce them, to better organize
	dependencies for their generation.
	(PROCESSEDDOCFILES): Redefine as simply the expansions of the
	foregeoing.
	(PROCESSEDFILES_DEPS_HTML, PROCESSEDFILES_DEPS_HTML,
	PROCESSEDFILES_DEPS_PDF, PROCESSEDFILES_DEPS_TXT): Add new
	macros defining prerequisites for production of the
	corresponding output document formats.
	($(PROCESSEDDOCFILES_HTML), $(PROCESSEDDOCFILES_PDF),
	$(PROCESSEDDOCFILES_PS), $(PROCESSEDDOCFILES_TXT)): Declare the
	dependencies using expansions of the foregoing macros.
	(MOSTLYCLEANFILES): Drop "doc/automake.pdf", now part of
	`PROCESSEDDOCFILES_PDF`.
	(doc/automake.pdf): Drop dependencies already supplied by
	`PROCESSEDFILES_DEPS_PDF`.
	(HTMLDOCFILES): Drop macro.  "doc/pic.html" is now in the
	expansion of `PROCESSEDDOCFILES_HTML`.
	(htmlpic_DATA): Redefine as expansion of
	`PROCESSEDDOCFILES_HTML` instead of `HTMLDOCFILES`.
	(PROCESSEDEXAMPLEFILES_HTML) [BUILD_HTML]: Define as
	"doc/webpage.html", otherwise as empty.
	(PROCESSEDEXAMPLEFILES_PS): Contain "doc/webpage.ps" and
	"doc/grnexampl.ps".
	(PROCESSEDEXAMPLEFILES): Redefine as expansions of
	`PROCESSEDEXAMPLEFILES_HTML` and `PROCESSEDEXAMPLEFILES_PS`.
	($(PROCESSEDEXAMPLEFILES_HTML), $(PROCESSEDEXAMPLEFILES_PS)):
	Declare dependencies using `PROCESSEDFILES_DEPS_HTML` and
	`PROCESSEDFILES_DEPS_PS`, respectively.
	(HTMLEXAMPLEFILES): Drop macro.  "doc/webpage.html" is now in
	the expansion of `PROCESSEDDOCFILES_HTML`.
	(nodist_htmlexamples_DATA): Drop macro, no longer needed.
	($(PROCESSEDDOCFILES_PS)): Relocated and redefined above.
	($(PROCESSEDEXAMPLEFILES) $(PROCESSEDDOCFILES)): Drop overbroad
	dependency declarations in favor of the above.
	(MOSTLYCLEANFILES, doc/examples.stamp): Drop generation and
	removal of unnecessary stamp file.
	(doc/pic.html, doc/webpage.html): Add explicit dependency on
	required preprocessors.  Drop redundant and spurious
	dependencies.
	* font/devhtml/devhtml.am (MOSTLYCLEANFILES)
	(font/devhtml/stamp): Generate and remove stamp file to enable
	reliable target dependencies for build-time generation of HTML
	documents by groff.
	* font/devpdf/devpdf.am (MOSTLYCLEANFILES, font/devpdf/stamp):
	Rename stamp file from "font/devpdf/build_font_files".
	(font/devpdf/stamp): Drop unnecessary dependency on "afmtodit".
	* font/devps/devps.am (MOSTLYCLEANFILES, font/devps/stamp):
	Generate and remove stamp file to enable reliable target
	dependencies for build-time generation of PostScript documents
	by groff.
	* font/devutf8/devutf8.am (MOSTLYCLEANFILES)
	(font/devutf8/stamp): Generate and remove stamp file to enable
	reliable target dependencies for build-time generation of
	UTF-8-encoded text documents by groff.

	Fixes <https://savannah.gnu.org/bugs/?62084>; thanks to
	Sergei Trofimovich for the report.  Also fixes
	<https://savannah.gnu.org/bugs/?62297>; thanks to Bjarni Ingi
	Gislason for the report.

2022-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Fix code style nits in Automake files.

	* doc/doc.am: Put spaces around (Auto)make variable assignments,
	for consistency with the rest of this .am file, and our others.
	* font/devpdf/devpdf.am (font/devpdf/build_font_files): Use
	shell '>' operator instead of touch(1).
	* font/devhtml/devhtml.am (font/devhtml/DESC):
	* font/devps/devps.am (font/devps/DESC): Construct target in
	temporary file, since doing so is a multi-step process, moving
	it to the target name when it is complete and usable by
	dependencies.

2022-04-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.cpp (main): When complaining of
	unrecognized option, report the entire option string (after
	the leading dash), not just its first character.

2022-04-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/error.cpp: Trivially refactor.  Explicitly
	compare pointer lvalues to null pointers instead of punningly
	treating them as Booleans.  Annotate use of zero literals as
	null pointers to ease any future migration to ISO C++11.

2022-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (an*abbreviate-inner-footer): Clean up better
	before early returns.  Remove temporary registers.

2022-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/fallbacks.tmac: Add fallbacks for U+02C6 MODIFIER LETTER
	CIRCUMFLEX ACCENT and U+02DC SMALL TILDE to Basic Latin
	characters.

2022-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Fix portability problem.  Don't pass echo(1) arguments
	containing backslashes because implementations handle them
	differently.  Use printf(1) instead.  Thanks to Bertrand
	Garrigues for reporting the problem and confirming the fix on
	his build host.

	* tmac/tests/e_chapter-titles-work.sh:
	* tmac/tests/e_ld-works.sh:
	* tmac/tests/localization-works.sh: Do it.

2022-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/gropdf/gropdf.pl (ppsz): Recognize "com10" (U.S.
	commercial envelope) paper format.

	Addresses the original issue reported in
	<https://bugs.debian.org/1009248>.  We have however broadened
	its scope; see <https://savannah.gnu.org/bugs/?62344>.

2022-04-27  Dave Kemper <saint.snit@gmail.com>

	* src/devices/gropdf/gropdf.pl (ppsz): Recognize ISO B-series
	paper formats using strings of the form "b0-b6", not "isob0-b6",
	for consistency with libgroff and papersize.tmac.

	Fixes <http://savannah.gnu.org/bugs/?62346>.

2022-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor to simplify.  Ingo's removal of the
	"--with-doc" "configure" option, among other changes, clears the
	way to remove many phony targets and simplify dependencies
	involving generation of the 5 formats of our Texinfo manual.
	(build_infodoc, doc, doc_all, doc_txt, dvi, doc_dvi, pdf,
	doc_pdf, html, doc_html): Drop phony targets.
	(all): Depend directly on doc/groff.{info,txt,html,dvi,pdf}.
	* NEWS: Add item since "make doc" is no longer necessary and
	will do nothing.

2022-04-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Handle `\R` sequences in text blocks robustly.

	* src/preproc/tbl/table.cpp (table::add_entry): Fix SEGV when
	repeating glyph table entry syntax (`\Rx`) used in a text block.
	Lift extraction of entry string to be done unconditionally,
	rather than in 5 different special cases.  This frees us up to
	rewrite the entry if necessary, changing '\R' to '\&' inside a
	text block.  Recast diagnostic to describe the problem
	clearly--"bad repeated character" suggests that something is
	wrong with the "argument" to `\R`, when really the problem is
	the _context_.

	Fixes <http://savannah.gnu.org/bugs/?62366>.

2022-04-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #62366.

	* src/preproc/tbl/tests/\
	do-not-segv-when-backslash-R-in-text-block.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-04-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/string.cpp (string::extract): Check return
	value of `malloc()` for nullity, and only poke into the buffer
	returned if it is valid.  Discovered while troubleshooting
	Savannah #62366.

2022-04-23  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	gnulib: replace non-recursive-gnulib-prefix-hack with
	automake-subdir option

	'non-recursive-gnulib-prefix-hack' is deprecated by gnulib's
	commit f8eed11b15e9141d061900e4068ea1f3ba9b63f6 and replaced by
	'--automake-subdir'.

	* bootstrap.conf:
	(gnulib_modules): Remove option
	'non-recursive-gnulib-prefix-hack'.
	(gnulib_tool_option_extras): Add option '--automake-subdir'.
	(bootstrap_post_import_hook): Remove the invocation of
	'build-aux/prefix-gnulib-mk'.

	* doc/automake.mom: update documentation accordingly.

	Fixes <http://savannah.gnu.org/bugs/?61708> and
	<https://savannah.gnu.org/bugs/?62205> , issues reported and fix
	suggested by Bjarni Ingi Gislason <bjarniig@rhi.hi.is>.  Fix
	also suggested by Werner LEMBERG <wl@gnu.org> (see
	<https://repo.or.cz/ttfautohint.git/commit/a938fc63cb55ef48393a924d7083b13c1352d294>).

2022-04-23  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	Update gnulib submodule

	* gnulib now points on c8b8f3bbcde37a53cd226f4c9cebd0dde6aca37f

	* bootstrap: merge the latest version from gnulib/build-aux
	{groff's bootstrap has a patch for OS X}.

	* bootstrap.conf: update copyright date.

2022-04-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (XH-UPDATE-TOC): Modify Keith Marshall's new XN/XH
	feature to indent TOC entries by section heading depth.  The
	increment is 2 ens per depth level.

2022-04-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (XA): Drop apparently useless `ll` request.  It
	doesn't do anything according to my tests.

2022-04-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/label.ypp: Drop redundant declaration of
	`yyparse`.  Both byacc 20140715 and GNU Bison 3.3.2 supply the
	the function prototype themselves.  Addresses
	"-Wredundant-decls" warning from GCC.

	Fixes <https://savannah.gnu.org/bugs/?43569>.

2022-04-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/hdb.cpp (DBGetType): Lower fatal diagnostics
	to errors when encounting invalid element type characters.
	Return a value interpreted by our caller as an error indication
	instead.  Helps compilers determine that we're not implicitly
	falling through our cases.  Addresses "-Wimplicit-fallthrough"
	warnings from GCC.

	Fixes https://savannah.gnu.org/bugs/?54702>.

2022-04-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/hdb.cpp (DBRead): Add more validity checking.
	Verify that the number of conversions returned by fscanf() is as
	expected instead of throwing this information away--abort
	processing ("giving up" like pic(1) does) if it does not.
	Consistently report this abandonment in diagnostic messages.
	Similarly validate pointer returned by fgets().  Soften handling
	of invalid text condition from fatal error, introduced in
	commit eb4f0675e, 16 August, to a normal one with abandonment of
	Gremlin file.  Addresses "-Wunused-result" warnings from GCC.

2022-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/main.cpp (conv): Throw an error diagnostic
	when failing to open a Gremlin picture file.

2022-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix extraneous space in output after `ME` or `UE` when
	mandoc wrapper is used.

	* tmac/an-ext.tmac (UE, ME): Double backslashes in macro
	definitions when interpolating `.$` register (just like we tell
	everyone else to do).  This one was interesting to track down.
	When using just `-man`, the problem never manifested; only with
	`-mandoc`.  The difference is that with the former, the `.$`
	register is initialized to zero; with the latter, because `TH`
	is aliased to another macro (then unaliased), `.$` has the
	argument count to the `TH` macro, not to the macros actually
	being called.  This caused the wrong branch of a conditional to
	be taken and put an extra space node on the output.

	Fixes <https://savannah.gnu.org/bugs/?62044>.

2022-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/cp1047.tmac:
	* tmac/latin1.tmac:
	* tmac/latin2.tmac:
	* tmac/latin5.tmac:
	* tmac/latin9.tmac: Stop remapping input soft hyphen characters
	with `tr` requests in character encoding macro files.  The
	formatter does this for us now.

2022-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Translate 8-bit NBSP and SHY on input.

	* src/roff/troff/input.h: Define constant integers for "input"
	no-break spaces and soft hyphens for EBCDIC and non-EBCDIC
	(presumably ASCII/ISO 8859/Unicode) systems.

	* src/roff/troff/input.cpp (token::next): Translate the input
	character codes for NBSP to \~ and SHY to \%.

	Fixes <https://savannah.gnu.org/bugs/?58962>.  Thanks to Dave
	Kemper for the report, code review, and his suggestion to push
	more work to compile time.

2022-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[groff]: Regression-test Savannah #58962.

	* src/roff/groff/handle_special_input_code_points.diff: Do it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2022-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_if_request): Clarify diagnostic;
	at the point it is thrown, we know not merely that we're in a
	conditional expression, but processing an output comparison
	operator.

2022-04-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi:
	* doc/ms.ms:
	* man/groff.7.man: Characterize "roff language" in the singular,
	not the plural, emphasizing the similarity of extant specimens.

	* doc/groff.texi (Conventions Used in This Manual): Add
	paragraph discussing denotations of "groff" and "roff".

	Fixes <https://savannah.gnu.org/bugs/?62233>.  Thanks to John
	Gardner and Dave Kemper for the discussion.

2022-04-12  Ingo Schwarze <schwarze@openbsd.org>

	Delete the harmful, ill-designed, buggy, and essentially
	unmaintained and untested --with-doc option of the configure
	script.

	* configure.ac: Delete five AM_CONDITIONAL variables, one
	autoconf(1) macro call, and some related diagnostic output.
	* doc/doc.am: Delete two BUILD_EXAMPLES and one BUILD_OTHERDOC
	conditional and use BUILD_HTML instead of BUILD_HTMLEXAMPLES.
	* m4/groff.m4: Delete the GROFF_DOC_CHECK macro and simplify the
	macros GROFF_HTML_PROGRAMS, GROFF_INSTALL_INFO, GROFF_MAKEINFO,
	and GROFF_PDFDOC_PROGRAMS.  This also deletes more than thirty
	configuration variables.
	* Makefile.am: Delete comments about 16 variables that are no
	longer set.
	* NEWS: Add details regarding the rationale.

2022-04-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.cpp (unicode_entity): Convert
	input U+00A0 to \~ as troff would, not to \[u00A0].

	Fixes <https://savannah.gnu.org/bugs/?62300>.

2022-04-11  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf] fails to deal with 255th glyph in font.

	* src/devices/gropdf/gropdf.pl: a pdf font can only contain 255
	glyphs. The array which holds the glyph names also holds the
	start position (zero) as first element, it is legal for it to
	contain 256 elements, so truncate to 256 (not 255).

	Fixes <https://savannah.gnu.org/bugs/?62294>.

2022-04-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[localization]: Define hyphenation mode registers for Japanese
	and Chinese.  They are set to zero but must be defined so that
	macro packages can rely on their existence without causing 'reg'
	warnings.

	* tmac/ja.tmac:
	* tmac/zh.tmac: Do it.

2022-04-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Add test for multi-lingual man(7) scenario.

	* tmac/tests/localization-works.sh: Test two more cases.  Ensure
	that the 'trap bit' (hyphenation value 2, which has nothing to
	do with any language) is preserved when switching locales back
	from a CJK language, since those languages' modes
	unconditionally clear it.  We test Japanese and Chinese; we have
	no localization macro file for Korean at this time.

2022-04-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Slightly refactor `an*abbreviate-inner-footer`.

	* tmac/an.tmac (an*abbreviate-inner-footer): Discard
	unnecessary string.

2022-04-09  Ingo Schwarze <schwarze@openbsd.org>

	Fix the configuration of texi2dvi.

	* m4/groff.m4: Set groff_have_texi2dvi if texi2dvi(1) is
	available and usable, even if the availability was specified by
	the user by manually providing the configure variable
	PROG_TEXI2DVI, and not only if it was autodetected.
	Also, set the PROG_TEXI2DVI Makefile variable to the name of
	the texi2dvi program specified by the user or autodetected,
	and not to the string "found", such that this Makefile variable
	can be used for invoking the program.
	* doc/doc.am: Call the texi2dvi program specified by the user
	or autodetected rather than hardcoding "texi2dvi".  This lets
	the groff build succeed on systems where the first texi2dvi
	in the $PATH is an old version unfit for groff's purposes.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Abbreviate long `TH` arguments more carefully.

	* tmac/an.tmac: Do it.
	(an*scan-string-for-backslash): Add new helper macro.
	(an*abbreviate-inner-footer): Rewrite.  Use the foregoing and a
	different technique to compute available space and shorten the
	string.

	Fixes <https://savannah.gnu.org/bugs/?62257>.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add regression test for Savannah #62257.

	* tmac/tests/an_do-not-abbreviate-escape-using-TH-arguments.sh:
	Do it.
	* tmac/tmac.am (tmac_TESTS): Run it.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Trivially refactor.  Rename strings `an-ifoot`
	to `an*ifoot` and `an-outer-footer-text` to `an*ofoot`.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Refactor.  Abbreviate page title and inner
	footer only once per document instead of once per page.
	Exception: the legacy macros `AT` and `UC` change the inner
	footer, so re-abbreviate it if they are called.
	(TH, AT, UC): Call abbreviation macros from here...
	(an-header, an-footer): ...instead of here.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Refactor: initialize header/footer environment
	only once.  Also rename it to `an*env-header-and-footer`.
	(TH): Do it here...
	(an-header, an-footer): ...instead of here.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Trivially refactor.
	(an*prepare-page-title): Rename this...
	(an*abbreviate-page-title): ...to this.
	(an-prepare-inner-footer): And this...
	(an*abbreviate-inner-footer): ...to this.
	(an-header, an-footer): Update call sites.

2022-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/other.cpp (hmotion_box::output): Fix typo in
	generated MathML diagnostic message.

2022-04-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (EXTRA_DIST): Add "groff.dvi" and "groff.pdf" to
	ensure that the GNU-released groff distribution archive contains
	our Texinfo manual in these formats.  (This doesn't increase the
	build-dependency requirements unless you want to "make dist", in
	which case it _should_.)

2022-04-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Add nroff mode fallback for `UL` macro.

	* tmac/s.tmac (UL): On nroff devices, bracket the first argument
	with \(ul (underline rule) special character escape sequences.
	{In plain language, '.UL "like this"' renders "_like this_".}
	See corresponding 12 February change to "tmac/e.tmac".

2022-04-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Drop unnecessary `-I` options to groff.
	(DOC_GROFF): There is no need to look at the top of the build
	directory for any file inclusions.
	(doc/webpage.html): There is no need to look in `doc_builddir`
	for file inclusions, since that is the current working directory
	when "webpage.ms" is processed.

2022-04-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Trivially refactor.  Use `RM` macro idiomatically.
	Automake ensures that it is defined to call an `rm` command with
	the `-f` option, and this in turn ignores failures to delete
	nonexistent files, so...
	(uninstall_doc_examples, uninstall-pdf): Stop adding superfluous
	`-f` flag.
	(clean_infodoc uninstall-pdf, uninstall-html): Stop prefixing
	command with `-` to ignore error exit status.
	(uninstall-html): Drop superfluous `-r` flag; we're only
	deleting files with this command, not directories.

2022-04-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Trivially refactor shell style in rule commands.
	The placement of `&&` was inconsistent.  Always begin a
	continued rule line with it, and don't give it its own
	indentation level.  In general, operators adjacent to line
	continuations should _follow_ the continuations because they are
	easier for humans to spot at the (possibly indented) beginning
	of a physical line.

2022-04-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am: Rename `TFLAG` macro, which means "tmac flag", to
	`MFLAG`, because it expands to `-M` options to groff, not the
	`-T` option, which can be bewildering.
	* doc/doc.am (DOC_GROFF): Update expansion site.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Rename `DOC_GROFF_ONLY` to `DOC_GROFF`.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor.  Drop ghastly hack used to get file
	names into troff diagnostics when reading from standard input.
	We've refactored so that it no longer does, making the hack
	unnecessary.  For the same reason, no users of the `DOC_GROFF`
	macro remain, so delete it.  Add comments to explain what
	`DOC_SED` and `DOC_GROFF_ONLY` are for.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor.
	(doc/pic.html, doc/webpage.html): Drop indirection of source
	document through `DOC_SED` macro.  It was not necessary since
	neither of these documents are parameterized in configuration
	options (that is, they don't contain @VERSION@ or @g@).

2022-04-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Trivially refactor.
	(doc/webpage.html): Tidy up dependency list.  Create directory
	using the same macro interpolation we use to change into it.

2022-04-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor and fix error in builds in remote
	out-of-source-tree builds exposed by pending commit and `make
	distcheck`.  The images generated for the pic.html and
	webpage.html files were being built in the wrong directory, and
	subsequently not found by an install rule.
	(imagedir): Add comment explaining purpose of macro.  It should
	_not_ be used with any file specifications relative to the
	source or build trees--it is for installation directories only.
	(htmldocimagedir, exampleimagedir): Drop macros.

	(doc/pic.html, doc/webpage.html): Replace interpolations of
	`imagedir` with literal "img", since these files are being
	generated within the build tree: the directory name is known.

	(mostlyclean_doc, install_doc_htmldoc, install_doc_examples):
	Replace interpolations of `htmldocimagedir` relative to
	`doc_builddir` with "img" literals.

	(install_doc_htmldoc, uninstall_doc_htmldoc): Interpolate
	concatenation of `htmldocdir` and `imagedir` instead of
	`htmldocimagedir` (relative to `DESTDIR`).
	(install_doc_examples, uninstall_doc_examples): Interpolate
	concatenation of `exampledir` and `imagedir` instead of
	`exampleimagedir` (relative to `DESTDIR`).

2022-04-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor.  Relocate "doc/grnexampl.ps" target to
	group it with other me(7) documents.  Put addition of
	"doc/examples.stamp" to `MOSTLYCLEANFILES` adjacent to its
	target rule.  Relocate same rule so that it precedes the target
	depending on it (make(1) might not benefit from this, but human
	readers can).

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor.
	(DOC_GROFF_ONLY): Drop preprocessor options from groff command.
	This macro is now, simply, a way to run the in-tree groff: no
	assumptions about preprocessors, macro packages, or output
	device are made.
	(doc/pic.html, doc/webpage.html): Add only necessary
	preprocessor options after expansion of `DOC_GROFF_ONLY`.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor.  Add explicit dependencies of compiled
	man page documents on preprocessors needed to generate them.  In
	their target rules, explicitly use groff's preprocessor options,
	freeing us up to simplify the `DOC_GROFF_ONLY` macro.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Rationalize dependencies.  Drop dependency of
	`PROCESSEDEXAMPLEFILES` and `PROCESSEDDOCFILES` on expansion of
	`hdtbltmac_DATA`, because nothing in this directory uses the
	hdtbl package.  Move dep of same expansions on "gnu.eps" to
	"doc/webpage.html", which actually uses it.  Put the numerous
	dependencies of "doc/pic.html" and "doc/webpage.html" in a
	parallel ordering so that they are easier for humans to
	evaluate.  These targets' dependencies on `bin_PROGRAMS` and
	`prefixexecbin_PROGRAMS` are overkill and should be reviewed at
	a later date.

2022-04-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Refactor use of target and suffix rules.
	(doc/meintro.me, doc/meintro_fr.me, doc/meref.me): Add target
	rules, with lengthy, exasperated comment about lack of feature
	parity in various make(1) implementations.
	(doc/meintro_fr.ps): Add target rule, as this seems to be the
	only way to keep GNU Make from ignoring a '_fr.me._fr.ps' suffix
	rule in favor of '.me.ps', which doesn't call preconv (and
	doesn't need to--and moreover we don't want to build English
	me(7) documents with the `-mfr` option).  Depend on `preconv`.
	(doc/webpage.ps): Convert from suffix rule to target rule.
	(doc/ms.ps, doc/pic.ps, doc/webpage.ps): Add target rules and
	dependencies.
	(.ms.ps): Add commented-out suffix rule (since nothing uses it,
	but might in the future).
	(doc/meintro_fr.ps, .me.ps, doc/pic.ps, doc/webpage.ps): Migrate
	expansions of `DOC_GROFF` to `DOC_GROFF_ONLY` to prepare for a
	forthcoming simplification.

2022-04-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Clean generated doc files better.  doc/me*.me were
	getting left behind in the build tree.
	(MOSTLYCLEANFILES): Add `GENERATEDDOCFILES`.  This includes
	`DOC_GNU_EPS`, so...
	(clean_maintdoc): Drop phony target that manually removes it.
	(maintainer-clean-local): Drop dependency on foregoing.

2022-04-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/xditview/xditview.am (install_xditview)
	[!WITHOUT_X11]: Stop backing up existing "GXditview" and
	"GXditview-color" application defaults files.  There is no
	symmetric restoration of them in the uninstall target, and it
	seems like unjustifiable complexity to add such.  These are
	groff-specific file names, installed (by default) to /usr,
	not /etc, so they are not going to be "configuration files" in
	Debian-based systems, for example (and likely not elsewhere).
	There are other ways to supersede application defaults for
	programs using the X Toolkit Intrinsics.

2022-04-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Stop treating "gnu.eps" as an "example" file; it
	is also used by pdfmark's cover.ms, which is ordinary
	documentation.  We therefore must not omit it when building.
	(install-data-hook): Add dependency on new phony target,
	"install_doc_gnu_eps".
	(install_doc_examples): Move installation of "gnu.eps" from
	here...
	(install_doc_gnu_eps): ...to here.  Also refactor the loop we
	use to locate the file to follow a more idiomatic pattern.

2022-04-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (dist-info-bits, install_infodoc, dist-gnueps): Fix
	code style nit: use consistent "brace style" in conditionals and
	loops.

2022-04-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (mostlyclean_doc): When cleaning, try harder to
	remove the image directory created by the "pic.html" and
	"webpage.html" targets.

2022-04-02  Ingo Schwarze <schwarze@openbsd.org>

	* doc/doc.am: Stop installing doc/meintro.me.in,
	doc/meintro_fr.me.in, and doc/meref.me.in.

2022-03-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/webpage.ms: Die horribly if `PSPIC` call fails.

2022-03-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pspic.tmac (pspic*error-hook): Define (as empty).
	* man/groff_tmac.5.man (Auxiliary packages) <pspic>: Document.
	* NEWS: Add item.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/webpage.ps): Relocate target rule.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/pdfpic_does-not-choke-on-bad-pdfinfo-output.sh:
	* tmac/tests/pdfpic_falls-back-to-PSPIC.sh: Remove output file
	even when skipping test.  Quote `fail` variable when checking it
	with `test -z`.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_tmac.7.man (Auxiliary packages): Tweak sboxes
	documentation to imply ms dependency.

	Fixes <https://savannah.gnu.org/bugs/?62062>.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (an*bookmark): Trivially refactor.  Now that
	we're no longer doing arithmetic on our first argument, simplify
	our definition.  Made possible by commit 3baf0e2f3, 23 February.

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.cpp (detect_file_encoding): Demote
	an error diagnostic to a debugging message.  libuchardet has no
	man page, and inspecting the source of the
	`uchardet_handle_data` function we find that it effectively
	returns a Boolean value (if the result of a
	`reinterpret_cast`(!) is not `NS_OK`).  This is useless
	information for a user-facing tool.  We're designed to muddle on
	regardless (see preconv(1)).

2022-03-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grodvi/dvi.cpp (dvi_printer::set_color)
	(draw_dvi_printer::fill_next):
	* src/devices/grops/ps.cpp (output::put_color):
	* src/libs/libgroff/color.cpp (color::print_color): Construct
	doubles instead of casting to them.

2022-03-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[doc]: Refactor handling of "gnu.eps" file.

	* doc/doc.am: Put "gnu.eps" in a Make macro, `DOC_GNU_EPS`.
	($(PROCESSEDEXAMPLEFILES) $(PROCESSEDDOCFILES),
	doc/webpage.html, install_doc_examples): Migrate dependency to
	`DOC_GNU_EPS`.
	(doc/webpage.ps): Add (missing) dependency on `DOC_GNU_EPS`.
	(DOC_GROFF_ONLY): Drop `-I` flag; it's not necessary given the
	following.
	(.ms.ps): Drop `-mwww` argument from suffix rule.  A truly
	generic ms document won't need it.
	(doc/webpage.ps): Add target rule.  Include `-mwww` argument.
	(doc/webpage.ps, doc/webpage.html): Pass `-I` option to
	`DOC_GROFF` and `DOC_GROFF_ONLY` (respectively) to enable
	location of "gnu.eps" file.  Search the build and source trees'
	"doc" directories because the file can be generated as part of
	the build or can come with the distribution archive.
	(EXTRA_DIST): Drop redundant inclusion of "doc/gnu.xpm".
	(clean_maintdoc): Add phony target to dispose of `DOC_GNU_EPS`.
	(maintainer-clean-local): Depend on "clean_maintdoc".

	* tmac/tests/pdfpic_does-not-choke-on-bad-pdfinfo-output.sh:
	* tmac/tests/pdfpic_falls-back-to-PSPIC.sh: Update tests to look
	for "gnu.eps" in "doc" directory of build tree.  Give generated
	files distinguishable names so their tests can run concurrently.

2022-03-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Add new macro `PROCESSEDDOCFILES_PS` to isolate
	names of targets in PostScript format.  Expand this macro in
	definition of `PROCESSEDDOCFILES` and use it to move PostScript
	font description file dependencies of the latter and
	`PROCESSEDEXAMPLEFILES` to the former.  (At present, the
	dependency might seem superfluous, since those files are in the
	source distribution, but it's conceivable that in the near
	future, they will be produced at build time from Adobe font
	metric files; see font/devps/generate/Makefile).  The "pic.html"
	and "webpage.html" targets already had such a dependency because
	of the way grohtml (pre-grohtml) works.

2022-03-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* INSTALL.extra: Add a section on uninstalling.

2022-03-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Create target rule for "doc/grnexampl.ps" instead
	of relying on a suffix rule.  Explicitly depend on grn and eqn
	executables.  Produce output using their groff flags, "-ge".

2022-03-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdfpic.tmac (PDFPIC): Fix breakage when no temporary
	directory environment variables are defined: actually use string
	interpolation syntax in comparand to output comparison
	operator.  Problem introduced by me in commits adc1999af and
	24900cf6d, 15 February.

2022-03-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devX100-12/devX100-12.am:
	* font/devX100/devX100.am:
	* font/devX75-12/devX75-12.am:
	* font/devX75/devX75.am: Fix in-tree build; expand `fontdir`
	instead of `abs_top_builddir` Make macro when defining Automake
	variable for generated artifacts.  Problem introduced by me in
	commit 3c82cbbfe, 27 February.  Thanks to Robert Goulding for
	the report.

2022-03-22  Ingo Schwarze <schwarze@openbsd.org>

	* doc/doc.am: delete redundant "SUFFIXES +=" line

2022-03-22  Ingo Schwarze <schwarze@openbsd.org>

	* doc/doc.am: fix non-portable syntax in the meintro_fr.ps
	target: This rule requires DOC_GROFF and hence $<, so turn it
	into a suffix rule.

2022-03-22  Ingo Schwarze <schwarze@openbsd.org>

	* doc/doc.am: fix non-portable syntax in the doc/me*.me targets:
	POSIX does not define the meaning of $< in non-suffix rules, so
	use the portable $? instead.  This is adequate here because each
	of these three rules has exactly one prerequisite.

2022-03-22  Ingo Schwarze <schwarze@openbsd.org>

	* doc/doc.am: fix non-portable syntax in the groff-man-pages.*
	targets by using DOC_GROFF_ONLY rather than DOC_GROFF in order
	to not use $< outside a suffix rule; DOC_GROFF functionality is
	not needed here in the first place.

2022-03-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac:
	* tmac/doc.tmac: Stop remapping input hyphens on `utf8` device.

2022-03-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac: Stop remapping ` and ' on `utf8` output device.
	Aligns mdoc(7) with commit 697e6db7f, 19 October 2020 (for
	man(7)).

2022-03-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Fix bug introduced in commit
	0d451902c, 10 March.  Don't store a newline in the version
	string.  Put `\n` in its interpolation context as necessary.

2022-03-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	Install ptx.tmac.

	* tmac/tmac.am (TMACNORMALFILES): Add it.
	* NEWS: Report availability.

	Fixes <https://savannah.gnu.org/bugs/?62201>.  Thanks to Ralph
	Corderoy for the report.

2022-03-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	Drop ditroff(7) document.  It says nothing that is not covered
	elsewhere.

	* man/ditroff.7.man: Delete.
	* doc/doc.am (GROFF_MAN_PAGES):
	* man/man.am (man7_MANS, EXTRA_DIST): Stop processing, shipping.
	* src/roff/groff/groff.1.man: Drop cross reference to it.
	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?61817>.

2022-03-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[preconv]: Trivially refactor.

	* src/preproc/preconv/preconv.cpp: Use diagnostic message
	functions from libgroff where possible.  Explain in a comment
	why we don't use `debug()`.  Boolify and rename some variables,
	and use Boolean literals to assign to them.
	  debug_flag         -> is_debugging
	  invalid_warning    -> emit_invalid_utf8_warning
	  incomplete_warning -> emit_incomplete_utf8_warning
	Rename `expected_bytes` to `expected_byte_count`.  Except for
	the debugging flag, these are all members of `struct
	conversion`.
	(get_tag_lines): Migrate to `warning()`.
	(detect_file_encoding): Migrate to `error()` and `fatal()`, as
	appropriate.
	(utf8::invalid, utf8::incomplete, get_tag_lines): Don't break a
	line in the middle of a diagnostic; doing so frustrates grepping
	and necessarily makes an assumption about the terminal width.

2022-03-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Trivially refactor.

	* src/roff/troff/input.cpp: Rename global variable
	`have_string_arg` to `have_multiple_params` and demote it from
	an integer to a Boolean.  Assign Boolean literals to it.
	(read_long_escape_parameters, get_copy, token::next): Do it.

2022-03-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix Savannah #62191.

	* src/preproc/tbl/main.cpp (table_input::get): Increment input
	line counter when encountering an escaped newline; this fixes
	inaccurate diagnostics from the formatter at any point in a
	document after a line-continued row of table data.  Also drop a
	"perhaps" comment.  I tested the surmise (setting the FSM state
	to "START"), and it results in bad formatting.

	Fixes <https://savannah.gnu.org/bugs/?62191>.  Problem appears
	to date back to groff 1.02 (June 1991) at the latest.

2022-03-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #62191.

	* src/preproc/tbl/tests/count-continued-input-lines.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2022-03-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Environments): Clarify environment handling.
	* man/groff.7.man (Environments): Add new section.

	Fixes <https://savannah.gnu.org/bugs/?62036>.  Thanks to Dave
	Kemper for the report and a suggested patch.

2022-03-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (initialization): Define `@b` as empty if
	formatting for HTML, because no page breaks occur in that
	format.

	Fixes <https://savannah.gnu.org/bugs/?62039>.

2022-03-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grodvi/dvi.cpp (usage): Align usage message with
	man page; disclose `-l` option.

2022-03-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grodvi/dvi.cpp (main):
	* src/devices/grops/ps.cpp (main): Update diagnostic:
	characterize bad `-w` argument as "invalid", not "bad", and
	explicitly report it as ignored.

	* src/devices/grodvi/dvi.cpp (main): Report invalid parameter
	in `-w` diagnostic.

2022-03-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grodvi/dvi.cpp (dvi_printer::set_color)
	(draw_dvi_printer::fill_next):
	* src/devices/grops/ps.cpp (output::put_color):
	* src/libs/libgroff/color.cpp (color::print_color): Explicitly
	cast `enum` divisors to `double`; quietens
	`-Wdeprecated-enum-float-conversion` warnings.

	Fixes <https://savannah.gnu.org/bugs/?61964>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-03-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Recover more quickly from missing `EE` calls.
	(initialization): Define new strings, `an*body-family` and
	`an*example-family` to house the font families used in these
	rendering contexts.
	(TH, SH, SS): Restore the font family to `an*body-family`.
	(TH): Set font style to roman as well.
	(EX): Change to `an*example-family` instead of literal "C".

	Fixes <https://savannah.gnu.org/bugs/?62187>.

2022-03-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Test register for existence before using it to
	set hyphenation mode.  A site troffrc or other local
	customization might remove the register (which is guaranteed to
	be set under the stock configuration) and, perversely, Heirloom
	Doctools troff interprets a `do` request, instead of ignoring it
	as a historical troff implementation would, so if they borrow
	our me(7) changes, the register would be unset, interpolate
	zero, and hyphenation would wind up disabled.

	Fixes <https://savannah.gnu.org/bugs/?62181>.  Thanks to Dave
	Kemper for the report.

2022-03-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Rename test to apply naming scheme.

	* tmac/tests/pdfpic_falls_back_to_PSPIC.sh: Rename this...
	* tmac/tests/pdfpic_falls-back-to-PSPIC.sh: ...to this.
	* tmac/tmac.am (tmac_TESTS): Use new name.

2022-03-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/ps.cpp (usage): Align usage message with man
	page synopsis.

2022-03-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Input Line Traps): Fix error; input traps do
	_not_ ignore control lines.  Error appears to have crept in with
	the first version of our Texinfo manual, shipped with groff 1.14
	{December 1999}.

2022-03-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devps/devps.am: Rename targets.
	(fonts):
	(devps_fonts): Rename these...
	(maintainer-font-descriptions):
	(devps_font-descriptions): ...to these.  Add comments explaining
	what they're for and why they aren't used in a build.

	* font/devps/generate/Makefile: Add `outdir` variable to store
	destination directory of font description files, and update all
	targets that write artifacts to use this directory.  This makes
	the targets "phony", which I don't regard as a problem since the
	generated artifacts are kept under source control, and this
	isn't really a user-facing script (even though it gets
	installed).  I think there is a good chance that this will
	become a shell script, because to avoid regressions we need to
	generate the font descriptions using both the 229-glyph and
	314-glyph versions of the Adobe fonts' AFM files (so that we get
	wider glyph coverage _and_ more kerning pair data) and we need
	to add kerning information for the ellipsis (Savannah #58897).
	(symbolsl.afm): Revise generation process to be sensitive to
	failure.

2022-03-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devps/symbolsl.afm: New file.
	* font/devps/devps.am (EXTRA_DIST): We have long shipped
	"symbol.afm" with the distribution archive--I don't see why we
	don't ship "symbolsl.afm" and "zapfdr.afm" as well (metrics for
	`SS`, the slanted symbol font, and ZDR, reversed Zapf Dingbats).
	Like the Type 1 font descriptions themselves, this file is
	updated only in "maintainer mode", not as part of the build.
	Moreover, these fonts are not part of the PostScript level 2
	base 35 fonts so their AFM files are unlikely to be readily
	available elsewhere.

2022-03-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Trivially refactor.  Store the
	program's version string in scalar `afmtodit_version` and use
	that in the usage message and comment embedded in the output.

2022-03-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Fix code style nits.  Migrate
	to the shebang line style we use in more recently modified Perl
	scripts.  Replace `-w` with `use warnings;`.  Shorten an output
	comment since the groff version string can grow long (see commit
	1264531310, 14 January 2018).

2022-03-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Stop writing full file name to
	the generated font description file as the "name" (i.e., don't
	include directory components).

	Fixes <https://savannah.gnu.org/bugs/?62150>.  Thanks to Dave
	Kemper for the discussion and code review.

2022-03-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.1.man:
	* src/utils/afmtodit/afmtodit.pl: Update and align man page
	synopsis, option descriptions, and command usage output.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/X.tmac: Redirect `fchar` requests for \[lq] and \[rq] to
	\[dq] since the X11 Type 1-based text fonts encode ISO 8859-1
	{Latin-1} and don't have typopgrapher's quotes.  Drop `fchar`
	request for \[aq], which _is_ represented, per recent changes.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* /font/devX100-12/CB:
	* /font/devX100-12/CBI:
	* /font/devX100-12/CI:
	* /font/devX100-12/CR:
	* /font/devX100-12/HB:
	* /font/devX100-12/HBI:
	* /font/devX100-12/HI:
	* /font/devX100-12/HR:
	* /font/devX100-12/NB:
	* /font/devX100-12/NBI:
	* /font/devX100-12/NI:
	* /font/devX100-12/NR:
	* /font/devX100-12/TB:
	* /font/devX100-12/TBI:
	* /font/devX100-12/TI:
	* /font/devX100-12/TR:
	* /font/devX100/CB:
	* /font/devX100/CBI:
	* /font/devX100/CI:
	* /font/devX100/CR:
	* /font/devX100/HB:
	* /font/devX100/HBI:
	* /font/devX100/HI:
	* /font/devX100/HR:
	* /font/devX100/NB:
	* /font/devX100/NBI:
	* /font/devX100/NI:
	* /font/devX100/NR:
	* /font/devX100/TB:
	* /font/devX100/TBI:
	* /font/devX100/TI:
	* /font/devX100/TR:
	* /font/devX75-12/CB:
	* /font/devX75-12/CBI:
	* /font/devX75-12/CI:
	* /font/devX75-12/CR:
	* /font/devX75-12/HB:
	* /font/devX75-12/HBI:
	* /font/devX75-12/HI:
	* /font/devX75-12/HR:
	* /font/devX75-12/NB:
	* /font/devX75-12/NBI:
	* /font/devX75-12/NI:
	* /font/devX75-12/NR:
	* /font/devX75-12/TB:
	* /font/devX75-12/TBI:
	* /font/devX75-12/TI:
	* /font/devX75-12/TR:
	* /font/devX75/CB:
	* /font/devX75/CBI:
	* /font/devX75/CI:
	* /font/devX75/CR:
	* /font/devX75/HB:
	* /font/devX75/HBI:
	* /font/devX75/HI:
	* /font/devX75/HR:
	* /font/devX75/NB:
	* /font/devX75/NBI:
	* /font/devX75/NI:
	* /font/devX75/NR:
	* /font/devX75/TB:
	* /font/devX75/TBI:
	* /font/devX75/TI:
	* /font/devX75/TR: Regenerate font descriptions with xtotroff,
	using updated ISO-8859_1 map.  \[aq] and \[oq] are now aliases
	of "'" and \[ga] is an alias of "`".  This change probably
	should have been made when the X11 fonts were corrected in
	XFree86 4.0 (March 2000).  See
	<https://www.cl.cam.ac.uk/~mgk25/ucs/quotes.html>.

	Fixes <https://bugs.debian.org/243238>.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libxutil/DviChar.c (ISO_8859_1_map): Fix incorrect
	assignment of Latin-1 grave accent to \[oq] special character;
	reassign it to the neutral apostrophe.  Map \[aq] to neutral
	apostrophe.  Map \[ga] to '`'.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/xtotroff/xtotroff.1.man (Options) <-d>: Document new
	option.
	* src/utils/xtotroff/xtotroff.c (usage): Align with man page.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Filling and Adjustment):
	Explicitly identify the page offset as an output line property
	that is not determined until a break occurs.

	(Line Layout) <po>: Correct error; the page offset for terminal
	devices is set by "tty.tmac", not "troffrc".  (The manual has
	been wrong for a long time; we've had it in tty.tmac since James
	Clark put it there in 1992.)  Recast and tighten wording.  Drop
	the word "horizontal"; there is no vertical page offset (as
	such) in *roff.  Replace hand-waving about unexpected results
	with a description of the formatter's behavior.  Document
	request behavior without an argument before getting into the
	weeds (and CSTR #54 errata).  Migrate terminology from "scaling
	indicator" to "scaling unit".

	Fixes <https://savannah.gnu.org/bugs/?58035>.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Expressions): Expand '|' operator explanation.
	Split discussion of its application into horizontal and vertical
	contexts.  Add example of vertical usage.

	Fixes <https://savannah.gnu.org/bugs/?60820>.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp: Trivially refactor.  Drop `#define`
	that was working around a GCC 2.95-era libstdc++ problem.
	Shorten long line.
	(get_char_for_escape_parameter): Demote parameter from `int` to
	`bool` and use Boolean literal for default argument.  Annotate a
	null pointer constant.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Rename some internal functions.

	* src/roff/troff/input.cpp: Do it.
	(read_escape_name):
	(read_long_escape_name):
	(read_two_char_escape_name):
	(get_char_for_escape_name):
	(read_increment_and_escape_name): Rename these...
	(read_escape_parameter):
	(read_long_escape_parameters):
	(get_char_for_escape_parameter):
	(read_two_char_escape_parameter):
	(read_increment_and_escape_parameter): ...to these.
	(read_two_char_escape_parameter, read_long_escape_parameters,
	read_escape_parameter, read_increment_and_escape_parameter,
	get_copy, token::next): Update call sites.

2022-03-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (get_char_for_escape_name): Recast
	diagnostic messages to more accurately refer to escape
	"sequence" rather than "name".  "Name" is a confusing term here,
	given that it also applies to a group of objects sharing a name
	space (natch): requests, macros, strings, and diversions.
	Further, the "escape name" cited by these diagnostics is not the
	escape function selector; that is, the character after the
	escape character which determines how the escape sequence is to
	be interpreted.  These diagnostics are only thrown after that
	function is known, however, when parsing of an escape sequence
	parameter is attempted.
	(input_char_description): Drop leading articles ("a") from
	input character descriptions, to economize in diagnostic
	messages this function helps produce.
	(non_empty_name_warning): Use zero copula for economy.

	* src/roff/troff/input.cpp (empty_name_warning, read_size)
	(token::get_char, check_missing_character):
	* src/roff/troff/number.cpp (start_number, parse_term): Recast
	messages to more consistently use the form "expected X, got Y"
	where feasible.

	* src/roff/troff/number.cpp (start_number): Say "numeric
	expression missing" instead of "missing number"; we don't
	require a terminal symbol in the expression grammar here.  Also
	use `tok.description()` where we can, and remove assumption that
	the escape character is the default.

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (AT, UC, HP): Add deprecation warnings.  For the
	last, only do so if we're not inside a synopsis (SY/YS), since
	our definition of `SY` calls `HP` internally.  (This does seem
	hypocritical.  Perhaps if we knew the correct CSS incantation
	to speak in grohtml, we could un-deprecate `HP`.)

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.an (M4CHECK): Rename stamp file to make its purpose
	clearer.

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Tweak customization management.

	* tmac/an.tmac: Load "man.local" with `msoquiet` request, so
	people can get rid of the file if they don't need it.
	(PT, BT): Define these macros only if not already defined.  This
	is slightly less paranoid but far more ergonomic, given
	interactions with the andoc wrapper.  Now user-defined page
	header traps (PT) defined in man.local can take effect on the
	first page rendered.

	* tmac/groff_man.7.man.in (Hooks): Document how to remove page
	headers and/or footers entirely.

	Fixes <https://savannah.gnu.org/bugs/?61954>.

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer,mm]: Add and use `ref*reset` macro to clean up between
	bibilography entries.

	* tmac/refer.tmac (]-): Move string clean up logic from here...
	(ref*reset): ...to this new macro.  Now we can also use it...

	* contrib/mm/refer-mm.tmac (ref*][-first-pass): ...here.

	Problem appears to date back to refer-mm.tmac's introduction in
	January 2011.  Thanks to Bjarni Ingi Gislason for the root-cause
	analysis and proposed fix, to which I applied the DRY principle
	and added a reset of `ref*string` as well.

	Fixes <https://savannah.gnu.org/bugs/?60657>.

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mm]: Regression-test Savannah #60657.

	* contrib/mm/tests/remove-stale-bib-entry-data.sh: Do it.
	* contrib/mm/tests/artifacts/60657.ref: Add new file.
	* contrib/mm/mm.am (mm_TESTS): Run test.
	(EXTRA_DIST): Ship test artifact in distribution archive.

	Thanks to Bjarni Ingi Gislason for the straightforward
	bug reproducer.

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Report correct line number in bibliography file
	diagnostics.

	* src/preproc/refer/refer.cpp (do_bib): Set line number to 1
	upon successfully opening a bibliography file.

	Problem appears to date back to groff 1.02 (June 1991) at the
	latest.

	Fixes <https://savannah.gnu.org/bugs/?62142>.

2022-03-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[refer]: Regression-test Savannah #62124.

	* src/preproc/refer/tests/report-correct-line-numbers.sh: Do it.
	* src/preproc/refer/tests/artifacts/62124.ref: Add new file.
	* src/preproc/refer/refer.am (refer_TESTS): Run test.
	(EXTRA_DIST): Ship test artifact in distribution archive.

2022-03-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/div.cpp
	(top_level_diversion::transparent_output):
	* src/roff/troff/input.cpp (transparent_translate): Suppress two
	troublesome (i.e., more or less spurious) error diagnostics
	about transparent output/throughput unless the environment
	variable `GROFF_ENABLE_TRANSPARENCY_WARNINGS` is present.  This
	is a bit of a bodge until we get diversion sanitization worked
	out.  See Savannah #61407.

2022-03-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[preconv]: Stop assuming that the default input stream, or an
	explicit '-' operand, is the only unseekable stream.  Check
	instead.

	* src/preproc/preconv/preconv.cpp (do_file): Add new Boolean
	`is_seekable`.  Test the input stream with `fseek()` per a
	suggestion from Ingo Schwarze.  Report unseekability in debug
	output and skip coding tag and uchardet tests altogether
	{precisely paralleling our description in the preconv(1) man
	page}.  Also update debugging output to say "<standard input>"
	instead of "-".

	Fixes <https://savannah.gnu.org/bugs/?62131>.

2022-03-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[preconv]: Regression-test Savannah #62131.

	* src/preproc/preconv/tests/do-not-seek-the-unseekable.sh: Do
	it.
	* src/preproc/preconv/preconv.am (preconv_TESTS): Run test.

2022-03-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (process_format): Update diagnostic
	to recognize that a font mounting position is also an acceptable
	argument to the 'f' column modifier.

2022-02-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	Refactor X11 font description generation.  Integrate it with our
	"new" (post-2014) Automake-based build system.

	* src/utils/xtotroff/Makefile.in: Delete relic of old build
	system.  Also, it had a bug: it generated X11 output device
	'DESC' files with a "unitwidth 10" directive even for the "-12"
	devices, which is not correct (the in-tree DESC files we've been
	shipping for years were nevertheless correct, apparently fixed
	by hand by James Clark in groff 1.07 [March 1993]).

	* src/utils/xtotroff/xtotroff.am: Define `xtotroff` variable for
	use by X11 font description generation targets below.

	* font/devX100-12/devX100-12.am:
	* font/devX100/devX100.am:
	* font/devX75-12/devX75-12.am:
	* font/devX75/devX75.am: Add new (phony) targets, variously
	named "devX{100,100_12,75,75_12}", to generate the corresponding
	output device's DESC file and run xtotroff(1) to generate its
	font description files.  Be sure to set the correct "unitwidth"
	for the "-12" devices.  Add new dependency-only rule
	"maintainer-font-descriptions" depending on these new targets
	for convenience (and future expansion to devps and devlj4).

	* FOR-RELEASE: Document existence of
	"maintainer-font-descriptions" Make target and when to run it.

	Running this target with the aforementioned bug fix, overwriting
	the in-tree DESC and font description files using data gathered
	from a running X server, results in no changes whatsoever.  Say
	what you will about X11 core font technology--it's stable.

2022-02-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	Rename and ship "FontMap-X11".  xtotroff(1) is not very useful
	without a font name mapping file to read.  To date it has been
	available only in the source distribution.  Remedy that.  The
	file is placed directly in the groff font directory alongside
	the device directories because it applies to four different
	devices, and four copies of this data are not required.

	* src/devices/xditview/FontMap: Rename to...
	* src/devices/xditview/FontMap-X11: ...this.

	* LICENSES:
	* src/devices/xditview/xditview.am (EXTRA_DIST): Reflect rename.

	* src/devices/xditview/xditview.am (install_xditview
	  [!WITHOUT_X11], uninstall_xtdiview): (Un-)install it.

	* src/utils/xtotroff/xtotroff.1.man (Files): Add section
	documenting the presence and purpose of this file.

2022-02-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[xtotroff]: Add `-d` option to produce font description files in
	specified directory.

	* src/utils/xtotroff/xtotroff.c: Do it.  Add global `destdir`
	pointer.
	(xtotroff_exit): Add new function to clean up storage allocated
	by `strdup()` (below) for destination directory.
	(MapFont): Introduce new variable `file_name`, into which we
	assemble a destination file name from `destdir` (if not null)
	and the troff font name.  Handle memory allocation failure (by
	carefully dying).  Free allocated storage on success and failure
	paths out of the function.
	(usage): Document new `-d` option.
	(main): Instruct `getopt_long` to expect a `-d` flag with an
	argument.  Use `strdup()` to make a copy of any such option
	argument.  Call `xtotroff_exit()` instead of `exit()`.

	* src/utils/xtotroff/xtotroff.1.man: Document new `-d` option.

2022-02-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[xtotroff]: Trivially refactor.

	* src/utils/xtotroff/xtotroff.c: Boolify.  Include `stdbool.h`
	and `errno.h` headers.
	(charExists, CanonicalizeFontName, FontNamesAmbiguous, MapFont):
	Boolify.  Demote return type from `int` to `bool` and return
	Boolean instead of integer literals.
	(FontNamesAmbiguous, main): Reorder equality comparisons with
	simple left-hand sides to avoid inadvertent lvalue assignments.
	(FontNamesAmbiguous, MapFont): Refer to font name as "invalid",
	not "bad", in diagnostic messages.
	(MapFont, main): Use `strerror()` instead of `perror()` so that
	diagnostics include the program name and an indication of
	problem severity.
	(MapFont): Compare `FILE` stream pointer to `NULL` instead of
	treating it as a Boolean.
	(main): Use `EXIT_SUCCESS` and `EXIT_FAILURE` constants from C
	library instead of integer literals for exit status.

2022-02-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pic]: Fix "unused result" compiler warning.

	* src/preproc/pic/pic.ypp (placeless_element) <SH>: Check return
	value of `system()` to quieten `-Wunused-result` warning; if it
	is less than zero, report it to the standard error stream.

2022-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/safer.tmac: Drop file from distribution.  It contained
	only comments.
	* tmac/tmac.am (TMACNORMALFILES): Delete reference.
	* NEWS: Add item.  Suggest two workarounds for its absence.

	Fixes <https://savannah.gnu.org/bugs/?61831>.

2022-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac (initialization): Drop definition of
	`doc-curr-size` register.  It is no longer needed since nothing
	internal to the package now changes the type size.

	* tmac/doc.tmac (Fl, doc-print-recursive, doc-print-prefixes)
	(doc-generic-macro, Ar, Cd, doc-do-func-decl, Fd, In, Nm, Pa)
	(Tn, doc-enclose-string, Ef, Bd, doc-save-global-vars)
	(doc-restore-global-vars, doc-diag-list, Xr, Dl, Vt, Ft, Fa)
	(doc-do-func, Fn, doc-do-func-args, Fo, Fc, %A, %B, %C, %D, %I)
	(%J, %N, %O, %P, %Q, %R, %T, %U, %V, doc-do-reference, Hf, An)
	Lk):
	* tmac/mdoc/doc-common (Sh, Ss, Rd):
	* tmac/mdoc/doc-syms (Ux, Bx, At, Dx, Fx, Nx, Ox, Bsx, St, Lb):
	Drop interpolations of the string and comments documenting that
	each macro has a side effect on the type size.

2022-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/doc.tmac (Tn):
	* tmac/mdoc/doc-syms (Ux, Bx): Stop interpolating string
	`doc-Tn-font-size` to set macro arguments at a smaller type
	size.  This leaves the string without a purpose, so...

	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Drop definitions of `doc-Tn-font-size`.

	* tmac/mdoc/doc-syms: Drop interpolations of that string from
	numerous other string definitions.

	Fixes <https://savannah.gnu.org/bugs/?60616>.

2022-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	Revert addition of man(7) `BD` register.  This feature, which I
	introduced in commit ea3b27102f (31 January) doesn't work
	because pdf.tmac normalizes the bookmark depth.  Embedding a man
	page in a larger PDF document with appropriately nested
	bookmarks is a project that will have to await another day (or
	perhaps already has tools to implement it).

	* tmac/an.tmac: Do it.
	* tmac/groff_man.7.man.in: De-document it.

2022-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdf.tmac: Add string containing the name of the macro
	package for use in diagnostic messages.
	(pdf:warn, pdf:error): Use it.

	Continues the long process of fixing Savannah #52463.

2022-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man,mdoc,me]: Revise hyphenation localization.

	* tmac/an.tmac (an*reset-hyphenation-mode): New macro sets the
	hyphenation mode appropriate to the locale depending on the
	values of `cR` (continuous rendering mode) and `HY` (hyphenation
	enablement); the latter is now interpreted as a Boolean.  Define
	new register `an*hyphenation-mode` reflecting these conditions.
	(TH): Call the foregoing instead of invoking `hy` request.
	(MR): Restore hyphenation mode to `an*hyphenation-mode`.
	(initialization): Simplify; if not defined, set `HY` to 1.

	* tmac/e.tmac (ld): Set the hyphenation mode here instead of in
	initialization (which already calls this macro).  Set the mode
	to 6 for the benefit of anyone borrowing our me(7) changes, but
	then immediately change to the mode determined by the
	localization file.

	* tmac/mdoc/doc-common (doc-hyphen-flags): Set a hyphenation
	mode appropriate to the locale, depending on the values of `cR`
	and `HY`.
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff: Simplify initialization; if not defined,
	set `HY` to 1.

	* tmac/cs.tmac:
	* tmac/de.tmac:
	* tmac/en.tmac:
	* tmac/fr.tmac:
	* tmac/it.tmac:
	* tmac/sv.tmac: Before switching locales, set a flag if
	troublesome value 2 of the hyphenation mode is set so that we
	can preserve it.  Shift man(7) and me(7) logic to follow setup
	of the new hyphenation mode; for the former, call the new
	`an*reset-hyphenation-mode`.

	* tmac/groff_man.7.man.in:
	* tmac/groff_mdoc.7.man: Document updated meaning of `HY`
	register.

	* NEWS: Add item noting change of man(7) `HY`'s meaning.  Update
	existing item regarding mdoc(7)'s support for it (groff 1.22.4
	mdoc(7) didn't recognize the register at all).

	Fixes <https://savannah.gnu.org/bugs/?61734> (for real this
	time?).

2022-02-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Regression-test Savannah #61734.

	* tmac/tests/an_reset-hyphenation-correctly.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-02-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_char.7.man (History): Add new section.
	(See also): Add cross reference to 1976 edition of CSTR #54.

2022-02-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man.in (Document structure macros) <EX, EE>
	[style]: Add material cautioning writers against asoociating
	the disablement of filling with some sort of "literal mode".
	Document still-operational status of inter-sentence space
	supplementation.
	(Notes) [style]: Describe an alternative (and macro
	call-symmetrical) means of using `RS` and `RE` with `TP`.

2022-02-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Add phony targets "man-all" and "man-clean" to
	{re-}generate and delete all man pages, respectively.

	Arguably fixes <https://savannah.gnu.org/bugs/?61167>.

2022-02-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am (.man): Prefix hyphenation control escape
	sequences to more configuration-time interpolations to prevent
	their hyphenation: @DEVICE@, @g@, @INDEX_SUFFIX@, @PAGE@,
	@TMAC_{AN,M,S}_PREFIX@, @TMAC_MDIR@.

2022-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Refactor `EX` and `EE` macros.

	* tmac/an-ext.tmac: Add new `mC` string to store the font name
	to be used for example regions.  In AT&T device-independent
	troff, "CW" was a common name, so use that.  It is however a
	terrible fit for groff's font family and style-combination
	functionality, and is inflexible in the face of font selection
	requests and escape sequences within the example region.  (One
	either needs to know the names of the fonts available on the
	output device, or suffer the indignity of mixed constant-width
	and proportional typefaces.)  Relatedly, drop groff-specific
	font remapping requests.
	(EX, EE): Ignore definition if GNU troff is the formatter.  Drop
	font family manipulation.  Drop specialized logic for groff's
	DVI output device.

	* tmac/an.tmac (initialization): Resurrect font remapping
	requests here.
	(EX, EE): Add new definitions, saving and restoring more state
	and remapping DVI output device fonts to reflect the absence of
	CWB and CWBI faces.

2022-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Slightly refactor.  Stop using groff's `HY`
	register to restore the hyphenation mode, since I plan to change
	its semantics to a Boolean value (see Savannah #61734).
	Introduce new register `mJ` to store "1" (if not groff) and the
	current hyphenation mode otherwise.  Explain why in a comment.
	(YS, UE, ME, MR): Restore hyphenation mode using `mJ` instead of
	`HY`.

2022-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: Trivially refactor.  Use a better idiom
	{seen in James Clark's changes to BSD me(7)} for conditionally
	defining a (simple) macro.

2022-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tty.cpp (tty_printer::special): Warn upon
	encountering unrecognized device control commands using the
	'tty:' tag.

2022-02-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Remove 'sgr' device control command.

	* src/devices/grotty/tty.cpp (tty_printer::special): Do it.
	* src/devices/grotty/grotty.1.man (Device control commands):
	{De-}document it.
	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?61561>.

2022-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdfpic.tmac: Add support for Cygwin/MinGW temporary
	directory conventions.

2022-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdfpic.tmac: Search for temporary directories as groff(1)
	does, instead of going straight to /tmp.
	(pdfpic@get-temporary-directory): New function checks each of
	its arguments for validity as a temporary directory; if one is
	found, its name is left in `pdfpic*temporary-directory`.
	(pdfpic@cleanup): Remove strings `pdfpic*temporary-directory`
	and `pdfpic*temporary-file`.
	(PDFPIC): Call `pdfpic@get-temporary-directory`, using the
	contents of the environment variables $GROFF_TMPDIR and $TMPDIR,
	and then /tmp, in that order.  Store the temporary file name in
	string `pdfpic*temporary-file`.  Use this string in subsequent
	`sy` and `so` requests.

	Fixes <https://savannah.gnu.org/bugs/?62055> for Unix systems.

2022-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Add test for PDFPIC fallback to PSPIC.

	* tmac/tests/pdfpic_falls_back_to_PSPIC.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Tweak PDFPIC test input.

	* tmac/tests/pdfpic_does-not-choke-on-bad-pdfinfo-output.sh:
	Eliminate unnecessary blank lines from input.  Also call gs(1)
	with '-q' in addition to '-o'.  (Why does the latter not imply
	the former?!)  Thanks to Deri James for the advice.

2022-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdfpic.tmac: Slightly refactor.
	(pdfpic@cleanup, PDFPIC): Rename `pdfpic*file-name` to
	`pdfpic*file-name-base` since it is not used as a complete file
	name (but rather a basis for an ".eps" extension).
	(PDFPIC): When testing PDF file extension, include the "."; a
	file name like "mxyzptlkpdf" is too dubious to accept.  Also
	explicitly compare `systat` register as equal or not equal to
	zero, since its truth value is inverted from the expectations of
	*roff expressions.

2022-02-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdfpic.tmac (PDFPIC): Refactor PDFPIC_NOSPACE handling.
	Stop shelling out to create, and then sourcing, a temporary file
	just to obtain the value of an environment variable.  groff
	already has the `\V` escape sequence for that purpose (it's even
	safe!).  Check that the value of $GROFF_PDFPIC_NOSPACE is a
	valid numeric expression before assigning it to a register.
	Trivially, use '=' instead of '==' as an equality operator.
	*roff languages do not use '=' as an assignment operator, and I
	believe the '==' synonym to be a sop to C programmers.

2022-02-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Stop attempting to adjust pargraph tag lines.

	* tmac/an.tmac (TP): Disable adjustment inside the diversion.
	(an-write-paragraph-tag): Restore adjustment outside of it.

	Fixes <https://savannah.gnu.org/bugs/?62051>.

2022-02-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (@z): Conceal bare tab after request name (exposed
	by no longer stripping the macro file).  See commit ad0575f20, 9
	December.

2022-02-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grops,troff]: Migrate to term "scaling unit" in diagnostics.

	* src/devices/grops/ps.cpp (ps_printer::do_import):
	* src/roff/troff/input.cpp (warnscale_request):
	* src/roff/troff/number.cpp (parse_term): Do it.

2022-02-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Add nroff mode fallback for `u` macro.

	* tmac/e.tmac (u): On nroff devices, bracket the first argument
	with \(ul (underline rule) special character escape sequences.
	{In plain language, '.u "like this"' renders "_like this_".}

	I regard this as a cosmetic and semantic improvement; since the
	quarter-em vertical motions used in troff mode were ignored in
	nroff mode, the effect was not underlining but a sort of
	strike-through, visible only at spaces in the argument.  The use
	of this macro was thus invisible in nroff output if no spaces
	were present in the argument.  This is probably the best we can
	do without a fatter interface to terminal device capabilities.

2022-02-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Simulate boxed text support on nroff devices with ISO 6429
	color escape sequences.

	* tmac/e.tmac (bx): Do it.  Add further fallback for non-groff
	formatters in nroff mode, bracketing the boxed argument with '|'
	glyphs.
	* doc/meref.me.in: Document it.

	Fixes <https://savannah.gnu.org/bugs/?62038>.

2022-02-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Rename registers `$v` -> `tv`, `$V` -> `dv`.

	* tmac/e.tmac: Do it.  Also include much commentary (including
	some from James Clark in 1992) attempting to illuminate the
	confusing history (and naming) of `$[rRvV]`.

	* doc/meref.me.in: Document it.  Introduce new terms
	"text vertical spacing" and "display vertical spacing" earlier
	and use them to condense and clarify discussions of their use.

	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?61710>.

2022-02-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Deferring Output): Add new node introducing
	and motivating environments, diversions, and traps.

2022-02-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Add more compatibility mode guards.

2022-02-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/pdf.tmac: Add compatibility mode guards so that we can
	run even if troff is given the -C option.  Resurrect your
	vintage 1975 Sixth Edition Unix manuals from '.deth' and format
	them in PDF today!

	Fixes <https://savannah.gnu.org/bugs/?61995>.

2022-02-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac: Prefix diagnostic with package file name
	literally.

2022-02-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Trivially refactor.

	* tmac/an.tmac (an*localize): Rename to...
	(an*localize-strings): ...this.
	(TH): Update call site.

2022-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Present several fundamental concepts.

	* doc/groff.texi (Page Geometry):
	* man/roff.7.man (Concepts): Add new node/section.
	  - page geometry
	  - basic units
	  - device resolution
	  - drawing position
	  - text baseline
	  - page offset
	  - vertical spacing
	  - page break

	Fixes the remainder of <https://savannah.gnu.org/bugs/?58035>.

2022-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Add page length insufficiency check.

	* tmac/e.tmac (@h): Port Keith Marshall's page length checker
	from ms(7).

	Fixes <https://savannah.gnu.org/bugs/?61034> and
	<https://savannah.gnu.org/bugs/?61428>.

2022-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Add test for insufficient page length error.

	* tmac/tests/e_rejects-too-short-page-lengths.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Slightly refactor.

	* tmac/e.tmac (@h): Use groff default scaling operator in
	conditional expression.  Add `do` requests so that the logic for
	checking the line length works in compatibility mode.  Also move
	misplaced parenthesis in conditional expression.

2022-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Refactor insufficient page length check.

	* tmac/s.tmac (pg@top): Drop extraneous closing parenthesis from
	numeric expression.  Change operator from '>' to '>='; a page
	length right at the boundary causes a spurious extra page break
	when a paragraphing macro is used to initialize the document.
	Condense diagnostic emission using the @error macro instead of
	duplicating it.  Change indentation to fit the style of the rest
	of the file (use hard tabs).  If aborting, truncate the page
	length to the current vertical position so that we don't
	uselessly output further vertical space.

2022-02-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Add test for insufficient page length error.

	* tmac/tests/s_rejects-too-short-page-lengths.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-02-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Vertically space delayed text like other annotations.

	* tmac/e.tmac ((d): Set vertical spacing using percentage in
	`$V` register.
	()d): Restore vertical spacing using percentage in `$v`
	register.

	Fixes <https://savannah.gnu.org/bugs/?61973>.

2022-01-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Expand '@PAGE@' when generating man pages.

	* Makefile.am (.man): Substitute the './configure'd paper format
	for @PAGE@.
	* src/roff/groff/groff.1.man: Use it.

2022-01-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Trivially refactor an-ext.tmac.

	* tmac/an-ext.tmac (EX, EE): Do a better job of keeping the
	name space promise made in comments at the top of the file.
	Rename `sP` register to `mP`.  Problem introduced by me in
	commit 69895ec20, 15 January 2020.  Also rename `la` and `ra`
	strings to `mL` and `mR`, respectively.  These (undocumented)
	string names date back to commit 259929625, 15 January 2007.

	* tmac/groff_man.7.man.in (Files) <an-ext.tmac>: Document the
	aforementioned promise.

2022-01-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Refactor PDF bookmark support.

	* tmac/an.tmac (an*bookmark): New internal macro calls
	`pdfbookmark` (only if the output device is 'pdf').
	(initialization): Migrate macro appendments to appropriate
	definitions.  Two cases...
	(SH, SS): ...were straightforward.
	(initialization): Another (for the man page title) was poorly
	placed when appended to the `TH` macro, skipping over the page
	header.  Move it instead...
	(PT): ...here.  But to keep this bookmark from being generated
	on every page of a document, we need a new variable
	`an*was-TH-bookmark-emitted` which is tested here and assigned
	once one bookmark corresponding to a `TH` call has been written.
	(TH): Initialize `an*was-TH-bookmark-emitted` to zero.
	(SS): Write the bookmark _before_ the subsection heading text.
	(initialization): Drop short-lived `BM` register.  It seems
	harmless to unconditionally include bookmarks in PDF output.  A
	PDF tool can strip them out if they're not desired, and viewers
	seem capable of minimizing or reducing the navigation pane (if
	they even offer one in the first place).

	* tmac/an.tmac (initialization): Rename new `BN` register to
	`BD`...
	* tmac/groff_man.7.man.in (Options) <BD>: ...and document it.
	Also document `PT`'s new bookmarking responsibility.

	Fixes <https://savannah.gnu.org/bugs/?58949> and
	<https://savannah.gnu.org/bugs/?58950>.

2022-01-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml,groff,nroff,troff]: Tweak usage message.

	* src/devices/grohtml/post-html.cpp (usage):
	* src/roff/groff/groff.cpp (synopsis):
	* src/roff/nroff/nroff.sh:
	* src/roff/troff/input.cpp (usage): Partly revert commit
	06ae7b0b8, 16 January.  Move an ellipsis back inside a bracketed
	operand (that is, an optional one).  On reflection, I think this
	notation makes it clearer that the command can be meaningfully
	run without operands.

2022-01-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/papersize.tmac: Slightly refactor.  Use new `stringdown`
	request instead of a combination of `tr`, `di`, `asciify`, and
	`chop`.

2022-01-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Slightly refactor.

	* tmac/an.tmac (an-prepare-page-title): Rename to...
	(an*prepare-page-title): ...this.  Also simplify numeric
	expression.  Add comment regarding necessity of correct
	environment.

	(an-header): Update call site of `an*prepare-page-title`.

	(TH): Move planting of `an-header` trap from out of the midst of
	footer trap management.  Add comments.

	(an-header): Move `pl` and `sp` requests from here...
	(PT): ...to here.  While it's conceptually nice to have these
	macros consist solely of `tl` requests, it doesn't yield enough
	power to those who want to redefine them.  Add comment.

	(an-footer, BT): ...simile.

2022-01-27  Dave Kemper <saint.snit@gmail.com>

	[man pages]: Add more references to pic(1)'s .PF.

	* contrib/chem/chem.1.man:
	* contrib/pic2graph/pic2graph.1.man:
	* src/utils/grog/grog.1.man: Do it.

	Fixes <https://savannah.gnu.org/bugs/?61949>.

2022-01-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	Implement PDF bookmark support for man pages.  Limitation: A
	{sub}section can only be bookmarked if it is specified in the
	arguments to the `SH` or `SS` requests, not on the next line in
	an input trap.  Thanks to Deri James for providing the
	fundamentals (blame me for any weird bits).

	* tmac/an.tmac (an-prepare-page-title): Define a new string,
	`an*page-ref-string`, which is the man page's own reference
	{such as "groff(1)"} without any abbreviation, ellipsis, or font
	selection or italic correction escape sequences.
	(SS): Define a new string, `an*subsection-heading`, storing the
	macro arguments (if any).  These could contain font selection
	escape sequences, for instance, a fact that becomes important
	later.
	(initialization):
	- Recognize `BM` register to enable PDF bookmarks (only on the
	  'pdf' output device); defaults on.  Recognize `BN` register to
	  set a base level/depth for the bookmarks; this is to ease
	  embedding of man pages in other PDF documents that already use
	  bookmarks.  The default is 0.  The registers are not yet
	  documented.
	- If the output device is 'pdf' and bookmarks are enabled, set
	  `PDFOUTLINE.FOLDLEVEL` and `PDFHREF.VIEW.LEADING` registers
	  {recognized by 'pdf.tmac'}.  Append to `TH`, `SH`, `SS` to get
	  the `an*page-ref-string`, `an-section-heading`, and
	  `an*subsection-heading` bookmarks in the document at the
	  applicable levels.

	* tmac/mdoc/doc-common: Add straw-man implementation--it doesn't
	support the `BM` and `BN` configuration parameters yet.  (This
	is enough to get bookmarks for the groff_mdoc(7) page to
	correctly appear in the new 'groff-man-pages.pdf' document.)
	(Dt, Sh, Ss): If the output device is 'pdf', place bookmarks in
	the document at levels 1, 2, and 3.

	Fixes <https://savannah.gnu.org/bugs/?58950>.

2022-01-26  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Allow multiline text in .pdfinfo

	* src/devices/gropdf/gropdf.pl: Use either '\\\\\\\\n' or
	'\[u000a]' as line separators in the string.

2022-01-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/trans.tmac: Further follow up commit c64fd60dff.  If the
	`andoc` wrapper is being used, perform man(7) localization (not
	just when `an` is loaded).

2022-01-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man pages]: Fix options used to generate compilations.

	* doc/doc.am (doc/groff-man-pages.pdf): Drop `-rU0` option (it's
	unnecessary since we don't yet have PDF hyperlink support in
	this document).  Add `-rC1` option to enable continuous page
	numbering.
	(doc/groff-man-pages.utf8.txt): Drop `-rC1 -rU1`.  Continuous
	page numbering is superfluous since page numbers are not shown
	in continuous rendering mode.  Stop turning on OSC 8 defaults;
	we don't know if the document will be viewed with a supporting
	pager+terminal combination, and further we don't yet have a
	mechanism for making `MR` man page cross references internal to
	the document when they indicate groff man pages.

2022-01-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man pages]: Ship compilations in UTF-8 text and PDF.

	Localization support and the resolution of Savannah #61266 have
	made it practical to batch-render all of groff's man pages as a
	single giant document.  Provide PDF and UTF-8 text (with ECMA-48
	escape sequences, but not the italic attribute or OSC 8
	sequences).

	Reasons for this addition include: {1} it is now possible,
	whereas I don't believe it was in any previous groff release;
	{2} many people still don't realize how much more pleasant
	reading typeset man pages can be (while a subjective assessment,
	I'm not alone[1]); {3} providing these forms permits full-text
	searching of groff's entire man page corpus via the PDF viewer
	or a pager like "less -R", the latter without sacrificing the
	style variations of the text that aid the reader to comprehend
	the material; {4} sentimentally, it honors the 50th anniversary
	of the first Unix manual (dated 3 November 1971)
	<https://www.bell-labs.com/usr/dmr/www/1stEdman.html>.

	* doc/doc.am (PROCESSEDDOCFILES): Add
	'doc/groff-man-pages.{pdf,utf8.txt}'.
	(GROFF_MAN_PAGES{1,2,3}): Add new macro storing names of all man
	pages generated in the build tree.  Motivate the reason for 3
	variables in a comment (it's due to groff locale switching).
	(GROFF_MAN_PAGES_ALL): Add convenience macro for use in
	dependency lists required by...
	('doc/groff-man-pages.{pdf,utf8.txt}'): ...these targets.
	Generate pages with the lint dial turned all the way up.

	Fixes <https://savannah.gnu.org/bugs/?61900>.

	[1] "The manual was intended to be typeset; some detail is
	sacrificed on terminals." (man(1), _Unix Time-Sharing System
	Programmer's Manual_, Eighth Edition, Volume 1, February 1985)

2022-01-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Commit c64fd60dff was not quite cooked.  The localized
	strings (in English) for the manual section titles need to be
	set at every document load (i.e., when `TH` is called), but only
	if the groff locale is "english".  When switching locales, these
	strings were getting "stuck" in their non-English translations
	even when returning to an English page.

	* tmac/an.tmac (an*localize): New macro initializes strings.
	(TH): Call `an*localize` if the locale is "english".
	(initialization): Drop initialization of section title strings.

	Continues fixing <https://savannah.gnu.org/bugs/?61734>.

2022-01-24  Deri James  <deri@chuzzlewit.myzen.co.uk>

	[gropdf]: Fix Savannah #61908

	* src/devices/gropdf/gropdf.pl: Adjust text position when
	given landscape media (i.e -P-l).

	Fixes <https://savannah.gnu.org/bugs/?61908>.

	Thanks to KUBO Koichi for finding the problem and supplying a
	patch.

2022-01-24  Deri James  <deri@chuzzlewit.myzen.co.uk>

	* src/devices/gropdf/gropdf.pl: A fix to importing pdf
	versions > 1.4.

2022-01-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Skip part of test if locale doesn't support UTF-8.

	* src/devices/grotty/tests/basic_latin_glyphs_map_correctly.sh:
	Skip test of 'utf8' output device if locale lacks UTF-8 support.
	But if the 'ascii' or 'latin1' test cases have already failed,
	report that instead.

	Fixes <https://savannah.gnu.org/bugs/?61891>.  Thanks to Bjarni
	Ingi Gislason for the report.

2022-01-23 Bjarni Ingi Gislason <bjarniig@rhi.hi.is>

	[man pages]: Fix typos.

	Fixes <https://savannah.gnu.org/bugs/?61430>.

2022-01-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Fix style nits in test.

	* tmac/tests/pdfpic_does-not-choke-on-bad-pdfinfo-output.sh:
	- Emit complaints about test environment to standard error.
	- Replace lingering literal file name with variable expansion.
	- Skip test if gs(1) fails, instead of reporting failure.
	- Begin continued lines with operators, for visibility.

2022-01-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix misspelled member variable.

	* src/devices/grohtml/post-html.cpp (class html_printer):
	Rename `supress_sub_sup` to `suppress_sub_sup`.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pdfpic]: Fix Savannah #58206.

	* tmac/pdfpic.tmac (PDFPIC): Scrub null bytes out of pdfinfo(1)
	output.  Thanks to an anonymous contributor for the patch (the
	commentary about it is mine, if someone wants an argument).

	Fixes <https://savannah.gnu.org/bugs/?58206>.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pdfpic]: Regression-test Savannah #58206.

	* tmac/tests/pdfpic_does-not-choke-on-bad-pdfinfo-output.sh: Do
	it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pdfpic]: Refactor.

	Now that the package does not abort upon the first whiff of any
	trouble, avoid littering groff's name spaces.  Take this
	opportunity to rename registers and strings to have obvious
	meaning to even the casual reader.

	* tmac/pdfpic.tmac: Do it.
	(pdfpic@cleanup): New macro removes temporary strings and
	registers.
	(PDFPIC): Call the cleanup macro upon entry; this way, if we
	errored out from a previous call, we avoid confusion.  (We don't
	clean up upon an error return because the leftover objects might
	be useful for troubleshooting.)  Rename registers and strings,
	to get them under name space discipline and also to better
	suggest their purpose.
	- convert-pdf     -> pdfpic*do-conversion
	- pdf-offset-mode -> pdfpic*offset-mode
	- pspic-args      -> pdfpic*pspic-args
	- pdf-offset      -> pdfpic*indentation
	- is-pdf          -> pdfpic*file-extension
	- img-file        -> pdfpic*file-name
	- pdf-wid         -> pdfpic*width
	- pdf-ht          -> pdfpic*height
	- pdf-deswid      -> pdfpic*desired-width
	- pdf-desht       -> pdfpic*desired-height
	Call cleanup macro before returning upon successful operation.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pdfpic]: Improve robustness.

	* tmac/pdfpic.tmac (@abort): Rename to `pdfpic@error`.  This is
	an auxiliary package, and something else could very well step on
	the former name (or worse, we break it if we're loaded later).
	(pdfpic@error): Stop aborting; simply report an error.  It's up
	to the user how serious `PDFPIC` macro problems are.  As noted
	in a comment, the user can easily `am pdfpic@error` to tack an
	`ab` request onto the end of its definition.  Always report
	input file name and line number.  Replace "[PDFPIC]" prefix with
	the name of the macro file complaining, to make it easier for
	groff non-experts to find.
	(PDFPIC): Return upon errors.  Recast diagnostic messages.  Stop
	implying that we perform any sort of probing test of file type
	{there's no telling what pdfinfo(1) will say}.  Apply new
	'stringdown' request so that we accept '.pdf' file name
	extension in any lettercase.  Test file argument for existence
	before proceeding (acknowledge TOCTTOU exposure).  Skip file if
	pipeline returned a non-zero exit status or the registers into
	which we extract the height and width are undefined (indicating
	failure of a temporary file to be created or read).  Reject
	files with non-positive image width or height reported by
	pdfinfo.  Validate `width` and `height` arguments, if given,
	rejecting non-positive values.

	Fixes <https://savannah.gnu.org/bugs/?61892>.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mdoc]: Make `Pa` macro interpolate basic Latin tilde on all
	output devices.

	* tmac/doc.tmac (Pa): Do it.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix incorrect line numbers in diagnostics.  Line numbers
	for multiple format-time diagnostics emitted by tbl(1)-generated
	groff input were off by +5 lines.

	* src/preproc/tbl/table.cpp: Fix it.
	(NOP_NAME): Add new preprocessor symbol to construct name of
	"nop" macro to be used as end macro for `ig` requests inside
	macro definitions.
	(table::init_output, table::compute_expand_list,
	table::compute_separation_factor):
	- Move `entry_list->set_location()` calls to more auspicious
	  locations.
	- Replace "around line X" language in diagnostic messages with a
	  more idiomatic, and less embarrassing, simple report of an
	  integer.
	(table::init_output):
	- Add `entry_list->set_location()` call right before emitting
	  diagnostic about a table row not fitting on a page.
	- Turn off eqn(1) delimiters when emitting diagnostic about a
	  boxed table not fitting on a page (necessitating `.TS H`
	  support), using new NOP_NAME-based end macro to achieve this
	  inside a macro definition.
	(table::compute_expand_list): Suppress issue of too-wide table
	diagnostic when the `EXPAND` table flag is set (corresponding to
	the `expand` region option), because other code already emits
	diagnostics in this case.

	Fixes <https://savannah.gnu.org/bugs/?60598>.  Problem appears
	to date back to commit 3bc4a53a45, 2013-01-07.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Add unit test for format-time diagnostics.

	Ensure that the various format-time diagnostics that a
	tbl-preprocessed document can generate (1) occur when they are
	supposed to and (2) are appropriately suppressed by the
	"nowarn" and/or "nokeep" region options.  One of them is an
	error and cannot be suppressed by the former, but _can_ be by
	"nokeep", which is arguably a bug (Savannah #61878).

	* src/preproc/tbl/tests/format-time-diagnostics-work.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TEST): Run test.

2022-01-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Trivially refactor.

	* src/preproc/tbl/table.cpp (table::compute_expand_width):
	Declare and initialize variables closer to use.  Also, the width
	computed is compared to the line length and indentation, so use
	these well-established *roff terms in the diagnostic message.

2022-01-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix Savannah #61854.

	* src/preproc/tbl/table.cpp (compute_expand_width): To properly
	warn if a table is too wide to fit between the indentation and
	the right margin, we need to compute its column widths including
	those eligible for expansion via the 'x' column modifier; we
	cannot use the same expression that we do to determine the
	amount of space we have to distribute among the expanded
	columns.  Iterate through columns again (the function was
	already doing so twice), once to potentially produce the
	warning, and then as before to distribute any available width.
	In other words, warnings were only being emitted for too-wide
	tables where one or more columns used the 'x' modifier.

	Fixes <https://savannah.gnu.org/bugs/?61854>.

2022-01-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Don't add leaders that don't lead anywhere.

	* tmac/s.tmac (toc*end-entry): If no page number string
	`toc*num` is defined, don't interpolate its emptiness prefixed
	with a leader (and tab).  This makes "no" as the first argument
	to `XS` and `XA` work as documented, suppressing not only the
	page number but the leader after the entry.

	Fixes <https://savannah.gnu.org/bugs/?61853>.

2022-01-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Add regression test for Savannah #61853.

	* tmac/tests/s_XA-literal-no-argument-suppresses-leader.sh: Do
	it.
	* tmac/tmac.am (tmac_TESTS): Run it.

2022-01-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Fix bad unit test.

	* tmac/tests/e_chapter-titles-work.sh: Fix missing shell test at
	end of script, which caused it to exit successfully regardless
	of any test failures.  Irritating.  This is among the fruits of
	the "never, ever use 'set -e'" tree.  (This religion has a thick
	bible: <https://mywiki.wooledge.org/BashFAQ/105>.)  Fortunately,
	all the tests pass legitimately.

2022-01-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[font]: For 'ascii' and 'latin1' devices, consistently define
	glyphs for ordinary characters before their special character
	aliases.  This parallels existing usage for the 'cp1047' device,
	and, I think, makes the file contents slightly more accessible.

	* font/devascii/R.proto:
	* font/devlatin1/R.proto: Do it.

2022-01-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Update diagnostic messages.

	* src/devices/grohtml/post-html.cpp (assert_state::add)
	(assert_state::compare, replace_negate_str)
	(assert_state::check_value_error, make_val): Make format of
	internal assertion system messages shorter and more mutually
	parallel.
	(html_printer::set_char, html_printer::set_numbered_char)
	(html_printer::set_char_and_width): Parallelize diagnostic
	messages with libdriver; see yesterday's commit.
	(main): Put information in argument to `assert()`; see commit
	11b43053, 24 November.

2022-01-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[nroff]: Emit usage message on usage errors.

	* src/roff/nroff/nroff.sh: Store the usage message in a shell
	variable instead of a here document, and sling it to the
	standard output or standard error streams, as appropriate.

2022-01-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml,groff,nroff,troff]: Tweak usage message.

	* src/devices/grohtml/post-html.cpp (usage):
	* src/roff/groff/groff.cpp (synopsis):
	* src/roff/nroff/nroff.sh:
	* src/roff/troff/input.cpp (usage): Stop putting an ellipsis
	inside a bracket expression (for file arguments); that suggests
	misleading complexity.

	* src/devices/grohtml/post-html.cpp (usage): Also don't set
	metasyntactic variable names in screaming capitals when they are
	separated from option letters by space and thus can't be
	confused with them.

2022-01-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libdriver]: Update diagnostic messages.

	* src/libs/libdriver/printer.cpp (printer::find_font): Describe
	the problem encountered instead of saying lamely "sorry, I can't
	continue".
	(printer::set_char_and_width, printer::set_numbered_char):
	Characterize input as "invalid", not "bad"; see commit bb7512b5,
	17 September.  When referring to font mounting position, say so.
	(printer::set_char_and_width): Describe required input character
	as "ordinary", not "ascii".  Apart from the incorrect casing,
	doing so better aligns with our terminology in groff_char(7),
	groff_out(5), our Texinfo manual, and other diagnostic messages;
	moreover, the use of "ascii" is potentially confusing to those
	whose environments use another encoding, like UTF-8 or IBM code
	page 1047.

	Fixes <https://savannah.gnu.org/bugs/?61829>.

2022-01-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Check basic Latin ("ASCII") glyph mappings.

	* src/devices/grotty/tests/basic_latin_glyphs_map_correctly.sh:
	Do it.
	* src/devices/grotty/grotty.am (grotty_TESTS): Run test.

2022-01-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[font,tmac]: Simplify Unicode character mapping process.

	* tmac/unicode.tmac: Drop.  It was originally added in 2005 to
	suppress horizontal spacing of glyphs in the range U+0483..9.
	Its purpose has wandered over the years; most recently to map
	the Basic Latin ("ASCII") hyphen-minus, apostrophe, and grave
	accent to special characters (and thus ultimately to the General
	Punctuation block).  But this is unnecessary since the font
	descriptions for devices with the `unicode` property can provide
	this information, and anyone who wants to alter the mappings can
	change either font description files, output device macro files,
	or troffrc; or add `char` requests to their macro packages or
	documents (in decreasing magnitude of ambition).

	* tmac/html.tmac:
	* tmac/tty.tmac: Stop sourcing unicode.tmac.

	* tmac/tmac.am (TMACNORMALFILES): Stop shipping it.

	* font/devutf8/NOTES: Drop remarks about mapping of \[a~],
	\[a^], and Basic Latin circumflex accent and tilde.  Not only do
	I disagree with the reasoning (whether these glyphs are "too
	small" depends on the font used by the terminal emulator, over
	which we have no control), but this mapping happens in a
	completely different part of the source tree,
	src/libs/libgroff/glyphuni.cpp.

	* font/devhtml/R.proto:
	* font/devutf8/R.proto: Add mappings for the five Basic Latin
	characters that map surprisingly (see groff_char(7)) and are not
	syntactically significant to troff.  Three of these are ported
	from unicode.tmac.
	(html): Don't migrate the hyphen-minus--yet.

2022-01-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tty-char.tmac: Drop redundant logic.  We don't need to
	source the `cp1047` or `latin1` files here; `troffrc` will
	already have loaded `tty` for us, which loads whichever applies.

2022-01-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Separate concerns better; stop re-generating plain
	text and HTML documents when the 'doc' target is updated; these
	are already handled by the 'build_infodoc' target.
	(build_infodoc): Use existing phony targets for plain text and
	HTML output files instead of repeating filename literals.
	(doc_all): Remove those same two phony targets from this one's
	dependencies.

2022-01-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp: Rename `eoi_macro_name` to
	`end_of_input_macro_name`.  It's long, yes, but better parallels
	`blank_line_macro_name` and `leading_spaces_macro_name`.  It is
	not used in lengthy expressions and furthermore clarifies the
	meaning of the nearby function name `eoi_macro` in one use.

2022-01-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.1.man (Limitations): Add
	subsection.

	Fixes <https://savannah.gnu.org/bugs/?55035>.

2022-01-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Be more careful with control characters when they are
	word-initial in filled text lines.  The idea is to prevent
	baffling surprises if a sentence is recast in a text editor, and
	a word beginning with a dot or neutral apostrophe is reflowed
	onto the beginning of the next input line--suddenly it is parsed
	as a control character.  Based on a patch by Bjarni Ingi
	Gislason.

	* contrib/hdtbl/groff_hdtbl.7.man:
	* doc/automake.mom:
	* doc/meintro.me.in:
	* doc/meintro_fr.me.in:
	* doc/pic.ms:
	* doc/webpage.ms:
	* src/devices/gropdf/gropdf.1.man: Do it.

	Fixes <https://savannah.gnu.org/bugs/?51312>.

2022-01-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Font Description File Format):
	* man/groff_font.5.man (Font description file format): Document
	restriction of kerning adjustment to glyph pairs from within a
	single font (since that is the scope of the font description).

	Fixes <https://savannah.gnu.org/bugs/?44715>.

2022-01-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* contrib/groff_filenames/groff_filenames.5.man: Remove
	superfluous paragraphing macro.

	Fixes <https://savannah.gnu.org/bugs/?55084>.  Thanks to Bjarni
	Ingi Gislason for the report and a suggested patch.

2022-01-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Operators in Conditionals): Update explanation
	of output-comparison conditional operator.

	Fixes <https://savannah.gnu.org/bugs/?60836>.

2022-01-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Use pnmtops(1)'s -quiet option if possible, to quieten
	build.

	* m4/groff.m4 (GROFF_PNMTOOLS_CAN_BE_QUIET): Add new macro to
	test pnmtops for support for (undocumented) '-quiet' option.

	* configure.ac: Perform the check.

	* doc/doc.am: Alter check of shell variable `pnmtops_nosetpage`
	{processed by AC_SUBST} to correctly match even if pnmtops
	accepts the '-quiet' option.

2022-01-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Manage hyphenation mode more carefully in localization
	packages.

	* tmac/{cs,de,it,sv}.tmac: Localize the man(7) package's HY
	register.

	* tmac/{cs,de,fr,it,sv}.tmac: When localizing the ms(7) package,
	use mode "2" instead of "3": the 'hy' request complains of
	contradictory hyphenation modes if "3" is used (the semantics of
	the hyphenation mode are complex and non-orthogonal; see
	groff(7) or our Texinfo manual).

	* tmac/{cs,de,en,fr,it,sv}.tmac: If the one language-independent
	hyphenation bit (don't hyphenate just prior to a page location
	trap) is set, preserve it; this way a system's troffrc or a
	macro package can set it and it will not get turned off by the
	localization package, which for best results should be loaded
	after any full-service package (and any auxiliary package
	requiring localized strings, though none are yet distributed
	with groff).

2022-01-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Add unit test for localization macro files.  Right now
	this just covers the hyphenation mode.

	* tmac/tests/localization-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2022-01-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[indxbib]: Document --version in usage message.

	* src/utils/indxbib/indxbib.cpp (usage): Document --version
	option.  Use more informative metasyntactic variable names.
	Organize usage message consistently with our others, and stop
	wrapping the output lines: we know neither the width of the
	terminal nor the length of the `program_name` string we're
	interpolating.  See commit b4de44f0, 19 July 2021.

2022-01-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libbib]: Refactor index header checking.

	* src/libs/libbib/index.cpp: Move more header validity checks...
	(index_search_item::load): ...from here...

	(index_search_item::check_header): ...to here.  Test all size
	values in header for negative values (never valid) before
	proceeding.  (These data could be changed to unsigned integer
	types in the file format, but that would require bumping the
	file version.  That in turn would make indexes generated with
	groff 1.23 unusable on systems running older groffs and, perhaps
	worse, would make groff 1.23 reject index files produced by
	older groffs.  On the other hand, the regeneration of index
	files should be, for those who use them, a common activity, and
	as long as the original database files are kept intact, it seems
	likely that most people, given modern machines, won't even
	notice a slowdown in document generation when refer(1) and
	friends fail to open the indices and fall back to full-text
	searches of the originals.  So we could still consider revising
	the file format before the groff 1.23 release.)

	* src/libs/libbib/index.cpp (index_search_item::load):
	Explicitly perform widening conversion from signed `off_t` value
	{from a stat(2) buffer} to an unsigned integer; quietens
	compiler warning about comparison between integers differing in
	signedness.

2022-01-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac (AC_CHECK_HEADERS): Expect stdbool.h, since we
	now use it in src/include/lib.h.

2022-01-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libbib, libgroff, indxbib]: Slightly refactor.

	Also, it's silly to test even numbers > 2 for primality.  Stop.

	* src/include/lib.h: Include `stdbool.h` since this header file
	is used for both C and C++ code.

	* src/include/lib.h (is_prime):
	* src/libs/libgroff/prime.cpp (is_prime): Boolify.  Return
	Boolean instead of integer literals and demote return type to
	`bool`.  Include `assert.h` and add assertion to reject
	mathematically offensive input.

	* src/libs/libbib/index.cpp
	(index_search_item::read_common_words_file): Test only odd
	numbers for primality.
	* src/utils/indxbib/indxbib.cpp (main): Same.  Since the number
	comes from user input, make it (a potential hash table size) odd
	first.

2022-01-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Internationalize and localize.

	* tmac/an.tmac (TH): Indirect predefined manual section titles
	through new strings `an*section[1-9]` so that they can be
	localized.
	(initialization): Give these strings English defaults.
	(TH): Move `ss` request from here...

	* tmac/en.tmac: ...to here.  It's not the man(7) package's
	business what the inter-word and inter-sentence spacing values
	are.  Also, having the correct[disputed] inter-sentence spacing
	value for English in its localization file restores it for the
	benefit of multi-lingual documents (mainly roff applications
	other than man(7)).

	* tmac/{cs,de,fr,it,sv}.tmac: Supply translations for the manual
	section titles; these were done by a monoglot American employing
	Google Translate, so those scandalized or running into howlingly
	wrong locutions are warmly invited to submit corrections.

	* tmac/trans.tmac: Load localized strings.

	Fixes <https://savannah.gnu.org/bugs/?61734>.

2022-01-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Handle auxiliary macro package
	arguments correctly.
	(process_arguments): Don't append the argument to the '-m'
	option to the command line; requested macro packages have
	dedicated logic.
	(construct_command): When iterating through requested package
	list, assume each element is an auxiliary package unless it
	matches an element in the list of main packages.  If the
	assumption holds, append the package name to a new list,
	`auxiliary_package_argument` (prefixed with '-m').  Push this
	list onto the command line after any main package.

	Also rename `$selected_main_package` to `$main_package` for
	brevity, and drop unused global lists `m` and
	`supplemental_package`.

	Fixes <https://savannah.gnu.org/bugs/?61758>.

2022-01-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/tests/smoke-test.sh: Add test cases for user
	specification of auxiliary macro packages.

2022-01-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Drop unnecessary code.  Apart from being superfluous, it
	prevented a user-defined value of the `sx` register from being
	applied to the first footnote marker interpolated, a subtlety
	that escaped my notice because the first footnotes in our
	"meref" and "meintro" documents are not numeric, but symbolic,
	and their markers occurred on lines with vertical space above
	and below.  (The bug was further masked by an otherwise
	redundant redefinition of the `*` string inside the `)f` macro.)

	* tmac/e.tmac ()f, +c): Stop redefining footnote marker string
	`*` after updating the automatic footnote number; its
	interpolation is already backslash-protected.
	()d, pd): Stop redefining delayed text marker string `#` for an
	analogous reason.
	(initialization): Drop unneeded `_*` and `_#` strings.

	Thanks to Robert Goulding for his feedback and patience.  See
	<https://savannah.gnu.org/bugs/?61025>.

2022-01-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/e_footnote-marks-work.sh: Enhance test.  Confirm
	that the automatic footnote number is reset to 1 by starting a
	new chapter with the `+c` macro.

2022-01-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Revise `n1` and `n2` interface and behavior.

	There were several bugs in the previous implementation.

	* tmac/e.tmac (po): Issue diagnostic if an attempt is made to
	set the page offset to a negative value.

	(n1): Accept new optional "C" argument to behave more (but not
	exactly) like roff(1), as the formerly-recognized "c" argument
	to `n2` did.  If present, the line length is reduced by the same
	amount (in new interface register `no`) as the line number field
	to preserve the overall line length.  Save the previous line
	length in internal register `_l` and set a flag, stored in `?N`,
	indicating this reduction.  Otherwise, the macro expects to be
	able to reduce the page offset to accommodate the line number.
	If it cannot (for example, with the zero page offset default
	used by nroff output devices), see above re: the `po` macro.

	(n2): Cache the last line number that may have been output,
	instead of the current one, so that we can operate on it
	consistently with user expectations.  Do this earlier, and
	rename this macro-local variable from `_ln` to `_n` so that we
	don't need groff's `do` request to operate on it.  Drop
	recognition of "c" as an optional second argument.  If turning
	off line numbering: if the line length was shortened (`?N`)
	restore the saved value and delete `_l` register; otherwise,
	reverse the change to the page offset.  Delete `_n` register.

	(initialization): Assign `\w'0000'u` to `no` register; this was
	previously hard-coded in `n1` and `n2`.  Initialize `?N` with 0.

	* doc/meref.me.in (roff Support): Update to reflect interface
	changes and describe behavior more accurately.

	* doc/meref.me.in (Summary):
	* tmac/groff_me.7.in (Registers): Document new `no` register and
	mark it as a groff extension.

	* NEWS: Add item documenting interface changes.

	Fixes <https://savannah.gnu.org/bugs/?61646>.  See the comments
	in the report for a lengthy enumeration of rendering problems
	exhibited by the previous implementation.

2022-01-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Add unit test for line numbering feature.

	* tmac/tests/e_line-numbering-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-12-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grohtml/post-html.cpp (style::style): Add
	initializer to argumentless constructor to avoid later read from
	uninitialized memory in `html_printer::do_font`.

	Fixes <https://savannah.gnu.org/bugs/?61748>.

2021-12-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	[groff]: Add regression test for Savannah #61748.

	* src/roff/groff/tests/html_works_with_grn_and_eqn.sh: Do it.
	* src/roff/groff/groff.am (groff_TESTS): Run it.

2021-12-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grohtml/post-html.cpp
	(html_printer::do_file_components): Emit fatal diagnostic if
	we're unable to `freopen()` standard output.  Quietens
	`-Wunused-result` warning from GCC 8.3.

2021-12-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grohtml/html.h (INT_HEXDIGITS): Add new constant
	to store the maximum possible quantity of digits in the
	hexadecimal representation of an `int`.

	* src/devices/grohtml/html-text.cpp (html_text::issue_tag):
	* src/devices/grohtml/post-html.cpp (html_printer::do_body):
	Guard against format string overflow by large integers in RGB
	color channel specifications; in a *printf format string, the
	precision (like the field width) is a _minimum_.  Quietens
	`-Wformat-overflow` warnings from GCC 8.3.

2021-12-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (get_image_generator): Clarify
	complex conditional expression.  Quietens `-Wparentheses`
	warning from GCC 8.3.

2021-12-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Rename new `$x` register to `sx`.  Since we expect the
	user to set this register directly, it should not be named with
	a leading '$' per the "me Reference Manual".

	* tmac/e.tmac (initialization, {, }): Do it.

	* tmac/groff_me.7.man:
	* doc/meref.me.in:
	* NEWS: Update documentation.

	* doc/meintro.me.in:
	* doc/meintro_fr.me.in:
	* doc/meref.me.in: Sync with new register name.

	See <https://savannah.gnu.org/bugs/?61025>.  Thanks to Dave
	Kemper for the discussion in
	<https://savannah.gnu.org/bugs/?61710>.

2021-12-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Slightly refactor.

	* src/roff/troff/div.cpp:
	* src/roff/troff/div.h:
	* src/roff/troff/input.cpp: Rename variables to reduce confusion
	between "end macros" and "end-of-input macros".  Call the latter
	"eoi" macros for brevity.

2021-12-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Fix code style nits.
	  - Use new terminology in diagnostic.  See commit 66ac1a8db9,
	    11 December.
	  - Drop unused '&&&' annotation for macro definitions.  This
	    was a BSD me(7) implementation detail wherein parts of the
	    package were broken out into module files, loaded if/when
	    their macros were called.  groff me(7) is monolithic, except
	    for devtag and refer(1) support.
	  - Remove '&&' end macro when we're done using it.

2021-12-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: (Re-)localize strings.

	* tmac/{cs,de,fr,it,sv}.tmac: Update package localizations to
	use new resources.  As a happy side effect (and with the new
	appendix string), the `+c` macro is now localized for Czech,
	German, and Swedish.

	* doc/meintro_fr.me.in (Les Parties du Document): Update example
	to reflect mixed-case default string used in chapter headings.

	* tmac/tests/e_ld-works.sh: Add tests for localization.

2021-12-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Internationalize strings.

	* tmac/e.tmac (initialization): Introduce internal
	`_mo1`..`_mo12`, `_dw1`..`_dw7`, and `_td_format` strings (with
	English defaults).  Define them outside of the new `ld` macro so
	that they can be overridden by localization packages.
	(ld) <dw, mo, td>: Populate via the above new strings.
	* tmac/trans.tmac: Stop defining `mo` and `dw`.  Instead, make
	them aliases of the new strings above.   Handle `wa` and `wc`
	similarly.

2021-12-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Add `ld` macro to re-init date/l10n stuff.

	* tmac/e.tmac (ld): New macro updates `y2` and `y4` registers
	and `wa`, `wc`, `mo`, `dw`, and `td` strings.

	* doc/meref.me.in (Miscellaneous, Predefined Strings):
	* tmac/groff_me.7.man (Macros): Document it.

	* tmac/tests/e_ld-works.sh: Add unit test.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?61670>.

2021-12-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/e_chapter-titles-work.sh: Add unit test for chapter
	heading feature.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-12-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Ease localization and customization by exposing
	strings for "Chapter" and "Appendix" instead of hard-coding
	these words into the `$c` macro.
	(initialization): Define new `wa` and `wc` strings.  Separate
	these and existing localization strings from `y2` and `y4`
	initialization since the latter don't involve natural languages.
	($c): Interpolate these strings in chapter and appendix headings
	and in calls to `$C` hook macro.  Set "Chapter" and "Appendix"
	in mixed case instead of full capitals, and set one
	adjustable nonbreaking word space `\~` between them and the
	chapter number instead of two unadjustable nonbreaking spaces.
	{These changes do slightly alter the default output of the
	package when the `+c` macro is used.}

	* doc/meref.me.in (Predefined Strings):
	* tmac/groff_me.7.man (Strings): Document new strings.

	* doc/meintro.me.in (Parts of the Basic Paper): Update example
	to reflect mixed-case default string.

	Fixes <https://savannah.gnu.org/bugs/?61661>.

2021-12-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (@p): Deactivate right alignment (the effect of
	groff's `rj` request) when starting a new paragraph.
	* doc/meref.me.in (Paragraphing) <lp>: Document this.

2021-12-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac ()c): Add bounds check to avoid attempting to set
	a negative indentation, provoking a troff warning.  Problem
	exposed by formatting "meintro_fr.me" document with default
	nroff mode line length.

2021-12-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Slightly refactor (boolify).

	* src/roff/troff/div.cpp:
	* src/roff/troff/div.h:
	* src/roff/troff/env.cpp:
	* src/roff/troff/input.cpp: Rename variables and demote from
	  `int` to `bool`.  Initialize and assign them using Boolean
	  literals.  The new names try harder to express a logical
	  predicate, and start with verbs to resist interpretation as
	  noun phrases.
	  - exit_started -> is_exit_underway
	  - done_end_macro -> is_end_macro_finished
	  - seen_last_page_ejector (demoted but not renamed)
	  - began_page_in_end_macro (demoted but not renamed)

2021-12-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Explain presence of undocumented `$r` and `$R`
	registers.

	Fixes <https://savannah.gnu.org/bugs/?61683>.

2021-12-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (bc): To get to the next column, space by the page
	length `.p`, not by the distance to the next trap (or 24 inches,
	as hard-coded in me(7) traditionally).  It is up to any sprung
	traps to issue further space requests or otherwise ensure a
	transition to the next column.

	See <https://savannah.gnu.org/bugs/?55081> for discussion.

2021-12-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac ({): Fix missing scaling unit in arithmetic
	expression: broke footnotes in troff mode.  Problem introduced
	by me in commit 6eafd208, 16 December.  Thanks to Robert
	Goulding for the (informal) report.

2021-12-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/{pic,webpage}.html): Quieten build.  Stop
	passing `-p` (progress) option to postprocessor, which produces
	TeX-like bracketed page numbers when images occur.

2021-12-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (.ms.html): Drop unused suffix rule.

2021-12-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am (tmac_XFAIL_TESTS): Mark test
	"e_footnotes-work-with-columns.sh" as expected to fail (as it
	does now, consequent to a reverted commit).

2021-12-16  Dave Kemper <saint.snit@gmail.com>

	* man/groff_tmac.5.man: Fix minor errors.

	Fixes <https://savannah.gnu.org/bugs/?61633>.

2021-12-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	Parameterize line height adjustment when super/subscripting.

	* tmac/e.tmac (initialization): Assign 0.2m to register `$x`.2m.
	({, <}: Apply adjustment, multiplied by -1 for superscripts.

	* doc/meref.me.in:
	* tmac/groff_me.7.man: Document it.

	* NEWS: Add item.

	* doc/meintro.me.in:
	* doc/meintro_fr.me.in:
	* doc/meref.me.in: Forego extra line height for more attractive
	typesetting.

	Fixes <https://savannah.gnu.org/bugs/?61025>.  Thanks to Robert
	Goulding for the suggestion.

2021-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac ($c): Draw the footnote separator no wider than
	the column width.

	Fixes <https://savannah.gnu.org/bugs/?61675>.

2021-12-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (2c): Accept an empty first argument, permitting
	the number of columns to be specified but preserving the default
	column separation.

	Fixes <https://savannah.gnu.org/bugs/?61671>.

2021-12-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (initialization): Initialize `$C` hook, preventing
	`mac` warnings from troff(1) if chapter title feature is used.

2021-12-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (i, bi): Add italic corrections.

2021-12-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Fix groff warnings and correctness issue.
	(n2): Prefix `ie` request with `do` because it uses the groff
	`\B` escape sequence.  Use braces to group multiple requests
	after an `el` request: `ie` and `el` count as two requests, not
	one.  Add comment regarding the unfortunate choice of brace
	style given *roff's syntactical constraints.
	(n2, (c): Conceal bare tab in request argument list (exposed by
	no longer stripping the macro file).

2021-12-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Revise diagnostic messages to follow GNU Coding Standards,
	identifying what is emitting them.

	* tmac/e.tmac (_e): New string holds "e.tmac".
	(@err): New macro constructs and issues diagnostics.  Add file
	name to messages when available.  Suppress line number when
	unavailable.
	(check_page_length, @z, @h, n2, sk, @p, @(, @), (c, )c, EQ, (f,
	++, @U): Call `@err` instead of invoking `tm` request.  Revise
	wording of messages in an attempt at clarity.

	Continues the long process of fixing Savannah #52463.

2021-12-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Slightly refactor footnote numbering.
	()f): Tighten code style and end string definition with comment.
	(+c, initialization): Drop unused auto-incrementation of
	footnote number register `$f`.  Add new string `_*` to use when
	{re-}initializing `*` outside of a footnote diversion, and
	interpolate the footnote number register instead of a literal.

2021-12-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/e_footnote-marks-work.sh: Add unit test.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-12-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Fix automatic numbering of delayed text.
	(initialization): Add `_#` string for use in multiple
	assignments of `#` string.
	(initialization, pd): Remove unused auto-incrementation from
	`$d` delayed text number register.
	()d): Increment `$d` register unconditionally, no longer
	conditionally on whether the delayed text marker string `#` has
	been interpolated.
	()d, pd): Update `#` string using new `_#` string.  Stop
	initializing the string with `\k` mark-setting escape sequence.

	* doc/meref.me (Annotations) <)d>: Document now-unconditional
	incrementation of `$d` register.

	Fixes <https://savannah.gnu.org/bugs/?61632>.

2021-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/e_delayed-text-marks-work.sh: Add test.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Rename internal register out of user name space.
	(@f): Rename `VL` to `__`; remove it immediately after using it.

2021-12-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/meref.me: Fix documentation error; the `$s` macro draws a
	horizontal line of 2 inches' length, not 1.5 inches.

	Fixes <https://savannah.gnu.org/bugs/?58682>.  Thanks to Dave
	Kemper for the report.

2021-12-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	Generate me(7) manual sources as part of the build.  We had been
	shipping 'me' sources with the string '@VERSION@' in them and
	only sed-replacing that to produce generated PostScript, but
	this replacement was not occurring for users who processed the
	documents themselves.

	* doc/meintro.me:
	* doc/meintro_fr.me:
	* doc/meref.me: Rename these to...
	* doc/meintro.me.in:
	* doc/meintro_fr.me.in:
	* doc/meref.me.in: ...these.

	* doc/doc.am (DOCFILES): Add the new *.in files.  Move the *.me
	files from here...
	(GENERATEDDOCFILES): ...to this new variable.
	(dist_otherdoc_DATA, EXTRA_DIST): Add `$(GENERATEDDOCFILES)`.
	(doc/me{intro{,_fr},ref}.me): Add new target rules.

	* src/utils/grog/tests/smoke-test.sh: Update test to look for
	the above source tree documents under their new names.

2021-12-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (.me.txt, .ms.txt): Drop unused suffix rules.

2021-12-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (DOC_SED): Add substitution of command prefix
	{"@g@"} so we can make accurate reference to groff commands with
	Unix counterparts in our documentation.

2021-12-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac: Add nroff mode string definitions for 4.4BSD
	compatibility.
	  - Define '{' and '}' (superscripting) strings as '[' and ']'.
	  - Define '<' and '>' (subscripting) strings as '\(la and
	    '\(ra' if available on the device, otherwise '<' and '>'.

	* tmac/tests/e_footnote-marks-work.sh: Update expected output.

	* doc/meref.me: Document it.

	Fixes <https://savannah.gnu.org/bugs/?61619>.

2021-12-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (doc/meintro_fr.ps): Add target rule (overriding
	suffix rule) to generate this file using `-mfr` (load the French
	localization macro file).

2021-11-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Drop redundant `do_divert()` declaration.

	* src/roff/troff/env.h: Do it.

	Fixes <https://savannah.gnu.org/bugs/?61433>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-11-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Remove `DEBUGGING` preprocessor cruft.

	* src/roff/troff/input.cpp:
	* src/roff/troff/mtsm.cpp: Stop defining `DEBUGGING`
	preprocessor macro (as empty).

	* src/roff/troff/input.cpp: Give `DEBUG_OPTION` an empty string
	value if the former is undefined, so the `getopt_long()` call
	will compile.

	Fixes <https://savannah.gnu.org/bugs/?61436>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-11-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Slightly refactor table format column modifier `p` and
	`v` validation.

	* src/preproc/tbl/main.cpp (process_format): Make code terser by
	introducing references to `list->point_size` and
	`list->vertical_spacing`.  Doing this requires a new scope
	{because a switch case isn't one} so add it, without updating
	indentation for this commit.  When complaining of out-of-range
	type size or vertical spacing, report the limit.

2021-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Improve diagnostic messages.

	Revise diagnostic messages generally to use terminology
	consistent with the recent rewrite of tbl(1), identify a
	contextual token when possible, and communicate more helpfully.

	* src/preproc/tbl/main.cpp (process_options): Tell the user
	which region option is missing a closing parenthesis or cannot
	accept an empty argument.  Refer to region options as such, not
	simply "options" (so they can't be confused with command-line
	options).  Say that input is "invalid" instead of "bad".
	(process_format): Say "table format specification" instead of
	just "format".  Say "column classifier" instead of "format".
	When a column modifier is missing an argument or a closing
	parenthesis, identify it and refer to it as a "column modifier"
	instead of omitting context.  Inform user that arguments to `p`
	and `v` column modifiers must be "(optionally signed) integer"s,
	not "numbers", lower these diagnostics' levels from error to
	warning, and indicate that the modifier is ignored.  Clarify
	diagnostic when extra characters trail `.` at the end of a table
	format line.
	(process_data): Say "table entry" instead of "data entry" when
	discarding an excess one.
	(process_table): Say we're giving up on "this table region", not
	this "table", particularly since any table continuations (.T&)
	are ignored.

2021-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix call to `getopt_long()`.

	* src/preproc/tbl/main.cpp (main): Stop telling `getopt_long()`
	to look for a `T` option.  Continues b4bbf32e, 16 October 2020.

2021-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Tweak usage message.

	* src/preproc/tbl/main.cpp (usage): Document `--version`.  Give
	version retrieval mode separate synopsis.  Use more normative
	synopsis syntax.

2021-11-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Fix code style nits.

	* src/preproc/tbl/main.cpp (process_input_file)
	(entry_format::debug_print, process_data, main): Replace
	`assert(0)` calls with communicative predicates.
	(struct input_entry_format, input_entry_format::debug_print,
	process_format): Boolify.  Demote and rename `int`s
	`last_column` and `equal` to `bool`s named `is_last_column` and
	`is_equal_width`.  Assign them Boolean literals.
	(process_format): Boolify.  Demote `have_expand`, `got_format`,
	and `got_period` from `int` to `bool`.  Use Boolean literals in
	assignments thereto.
	(process_options): Swap order of null pointer comparison when a
	typo or thinko could lead to lvalue assignment.
	(process_data): Boolify.  Demote `give_up` from `int` to `bool`.
	Demote and rename `int` `row_comment` to `bool`
	`seen_row_comment`.  Use Boolean literals in assignments
	thereto.
	(main): Use standard C library symbols `EXIT_SUCCESS` and
	`EXIT_FAILURE` with `exit()` calls instead of `0` and `1`.

2021-11-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Fix Savannah #61520.

	* src/utils/grog/grog.pl: Move hash `preprocessor_for_macro` to
	global scope since it is now mutable across `do_line` subroutine
	calls.
	(do_line): Adjust regex matching an end macro to work better.
	Check names of macros being defined by the document; if they
	start with '[' or ']', stop attempting to detect refer(1) usage,
	by deleting its key from the `preprocessor_for_macro` hash.

	Fixes <https://savannah.gnu.org/bugs/?61520>.

2021-11-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Add regression test for Savannah #61520.

	* src/utils/grog/tests/avoid-refer-fakeout.sh: Do it.
	* src/utils/grog/grog.am (grog_TESTS): Run test.

2021-11-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Page Motions):
	* man/groff.7.man (Escape short reference): Fix error: the `\r`,
	`\u`, and `\d` escape sequences move in ems, not vees, despite
	being vertical motions.  Add discussion and example.  Thanks to
	Bjarni Ingi Gislason for pointing out the problem in groff(7)
	and Tadziu Hoffman for his lucid explanation.

	Fixes <https://savannah.gnu.org/bugs/?61437>.  Thanks to Bjarni
	Ingi Gislason for the report and a suggested patch.

2021-11-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/include/error.h: Drop `extern` storage class from
	diagnostic function prototypes.  Drop parameter names from
	prototypes, in keeping with the Stroustrup-style C++ used in
	most of groff.

2021-11-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/font.cpp (font::load): Update diagnostic
	messages to say "kerning pair" instead of "kern pair".

2021-11-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_size): Update diagnostic
	messages to use more normative language: say "type size" instead
	of "point-size", and "escape sequence" instead of "escape".
	* src/roff/groff/tests/\
	use_point_size_escape_with_single_digit_arg.sh: Update expected
	diagnostic wording in text.

2021-11-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_size): Boolify.  Update
	prototype.  Demote return type from `int` to `bool`.  Use
	Boolean literals for return values.  Similarly demote local
	variable, rename it from `bad_digit` to
	`contains_invalid_digit`, and use Boolean literals with it.

2021-11-16  Deri James  <deri@chuzzlewit.myzen.co.uk>

	* src/devices/gropdf/gropdf.pl: Fixes to importing pdf versions
	> 1.4.

2021-11-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: If "nowarn", suppress table row warning.

	* src/preproc/tbl/table.cpp (table::init_output): Bracket the
	generated groff code that emits a warning if a table row
	overruns a page location trap (usually, is too long to
	vertically fit on the page) in a test for whether the "nowarn"
	region option was given, so that this warning is suppressed as
	well when that option is used.
	* src/preproc/tbl/tbl.1.man (Region options): Document new
	"nowarn" behavior.

	{"nokeep" also suppresses this warning, for a different reason;
	no diversion is created to hold the table row, so its vertical
	size does not exist to be compared to the distance to the next
	page trap.}

	Fixes <https://savannah.gnu.org/bugs/?61477>.

2021-11-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::do_vspan): Fix code style
	nits.  Swap order of null pointer and zero equality comparisons
	when a typo or thinko could lead to lvalue assignment.  Break a
	series of 6 and-ed assertion predicates into separate `assert()`
	calls--sure to be less maddening for anyone who has to debug
	such a contingency.  Clarify comment since C++98 didn't yet have
	`nullptr`.

2021-11-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[m4]: Clean up shell variable quoting and bracing.

	* m4/groff.m4 (GROFF_PROG_YACC, GROFF_MAKEINFO)
	(GROFF_BROKEN_SPOOLER_FLAGS, GROFF_TARGET_PATH_SEPARATOR): Stop
	bracing shell variable expansions that don't require it; the
	shell is not make(1).
	(GROFF_PROG_YACC, GROFF_MAKEINFO): Double-quote shell variable
	expansions that might produce whitespace.
	(GROFF_MAKEINFO): Drop unnecessary leading zeroes from version
	number component construction.  Drop unnecessary escaping of
	plus sign in expr(1) input.

2021-11-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[m4]: Clean up test(1) usage.

	Get rid of string (non-)nullity tests and comparisons involving
	concatenation with garbage (usually "x").  Even the GNU Autoconf
	manual's shell portability material doesn't recommend this.  It
	must be either a bodge cooked up by shell programmers who
	couldn't remember to quote variable expansions, or a workaround
	for shells of such poor quality that they defied the odds and
	decayed out of usage or got fixed.

	Instead, use double quotes (only where necessary).  Test for
	non-empty strings with "test -n" and empty strings with "test
	-z".  Stop quoting literal comparands that obviously have no
	shell metacharacters in them.

	* m4/groff.m4 (GROFF_PRINT, GROFF_PROG_YACC, GROFF_PERL)
	(GROFF_DOC_CHECK, GROFF_MAKEINFO, GROFF_TEXI2DVI)
	(GROFF_HTML_PROGRAMS, GROFF_PDFDOC_PROGRAMS, GROFF_PAGE)
	(GROFF_TMAC, GROFF_WITH_COMPATIBILITY_WRAPPERS, GROFF_X11)
	(GROFF_APPRESDIR_DEFAULT, GROFF_APPRESDIR_CHECK)
	(GROFF_HAVE_TEST_EF_OPTION, GROFF_BASH, GROFF_UCHARDET)
	(GROFF_UCHARDET_CHECK, GROFF_PDFTOOLS)
	(GROFF_USE_GROFF_ALLOCATOR): Do it.

2021-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_TEXI2DVI): Add dependency on
	`GROFF_MAKEINFO` macro.  Rewrite to also test `MAKEINFO`
	variable, which is empty if the `makeinfo` command is not
	installed or too old.  Consequently ignore `texi2dvi` if is too
	old without having to do a version check (since it and
	`makeinfo` are distributed together, both being part of GNU
	Texinfo).

	* doc/doc.am (.texi.dvi, .texi.pdf): Update error message to
	indicate that `texi2dvi` is _either_ missing or too old.

2021-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_MAKEINFO): Stop throwing a warning if the
	installed `makeinfo` is old but the distributed Info manual is
	up to date.  This is not a configure-time problem; the user will
	be notified when they run 'make' if they modify doc/groff.texi,
	or if they run 'make doc' (which has required a TeX installation
	for years).  Empty the `MAKEINFO` variable immediately if a
	too-old version is detected.  Drop needless `AC_SUBST`itution of
	the detected `makeinfo` version.

2021-11-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_HTML_PROGRAMS): Clarify message; it is only
	groff-generated HTML that is disabled by the absence of the
	programs checked for.  (`makeinfo` can still generate our
	Texinfo manual in HTML format.)

2021-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[build]: Drop `BUILD_INFODOC` symbol.  Ship manual in GNU Info,
	text, and HTML forms in distribution archive.

	* Makefile.am (MAINTAINERCLEANFILES): Initialize.
	(MOSTLYCLEANADD): Drop unused variable.
	* configure.ac: Drop `AM_CONDITIONAL([BUILD_INFODOC]...`.
	* doc/doc.am (EXTRA_DIST): Rearrange shipment of our Texinfo
	manual source files to precede all of the generated forms, for
	clarity.  Drop all `BUILD_INFODOC` conditionals.  Make
	`build_infodoc` phony target depend on plain text, GNU Info, and
	HTML forms of Texinfo manual unconditionally.  Also drop unused
	variables `groffinfodir`, `groffpdfdir`, and `texi2dvi_missing`.
	(EXTRA_DIST, MAINTAINERCLEANFILES): Add Info form of manual.
	Drop glob pattern attempting to match the segments that
	`makeinfo` breaks it into.  It isn't necessary for
	MAINTAINERCLEANFILES.
	(EXTRA_DIST, MAINTAINERCLEANFILES): Add text form of manual.
	(EXTRA_DIST, MAINTAINERCLEANFILES): Add HTML form of manual.
	(dist-hook): Depend on new (phony) target `dist-info-bits`.
	(dist-info-bits): Look for the info document in the build
	directory, then the source directory.  (It could be in either
	place depending on whether the build from a Git working tree is
	being done in or out of a separate build directory.)  When
	found, copy the segments to the assembly area for the
	distribution archive.
	(install_infodoc): Refactor.  Remove any groff info files from
	the destination info directory using a shell glob directly
	instead of a partly redundant ls(1) command substitution.
	Similarly, use a shell glob to cp(1) the info files (including
	any matched segments) to the destination info directory before
	running `install-info`.  (In this process I learned that
	`install-info` doesn't "install" anything; instead, it
	{de-}registers info files with their top-level catalog.)

2021-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (.texi.txt, .texi.html): Reorder pattern rules to
	make it clearer which formats require only `makeinfo` and which
	require `texi2dvi`.  The latter imposes more build dependencies,
	including a full TeX installation.

2021-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[mom]: Build more quietly.

	* contrib/mom/mom.am (penguin.{ps,.pdf}): Make targets quiet by
	default; they are simple file copies.

2021-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Revise a test's setup.

	* src/roff/groff/tests/fp_should_not_traverse_directories.sh:
	Revise search for device/font description directory to work in
	within-source-tree builds and (for now) with the approach used
	by Automake's "distcheck" target.

2021-11-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Accept `\&` as an empty table entry.

	* src/preproc/tbl/table.cpp (table::add_entry): Suppress
	diagnostic about non-empty table entries classified as `_` or
	`=` if the entry consists of exactly `\&`.

	* src/preproc/tbl/tbl.1.man (Table data): Document this idiom.

2021-11-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Update diagnostic messages.

	* src/preproc/tbl/main.cpp (process_options, process_format):
	* src/preproc/tbl/table.cpp (table::add_entry): Align diagnostic
	text with terminology now used in tbl(1) man page.
	  - "global option" -> "region option"
	  - "specifier" -> "column modifier"
	  - "format" -> "column classifier"

2021-11-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Fix missing colon in diagnostic messages.

	* src/libs/libgroff/error.cpp (do_error_with_file_and_line):
	Restore missing colon to diagnostic text.  Problem introduced by
	me in commit 9a038161, 8 November.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff,grops]: Slightly refactor.

	* src/devices/grops/ps.cpp: Explicitly preprocessor-include
	"lib.h" since we use the `PI` symbol it defines.

	* src/include/lib.h: Add inclusion guard.  Wrap only `extern "C"
	and its braces in preprocessor conditionals, so that prototypes
	are present in the header even for C language code that
	#includes this header.  Add `static` storage class to `PI`
	symbol to avoid redefinition errors from the linker.

	* src/libs/libgroff/iftoa.c (if_to_a):
	* src/libs/libgroff/itoa.c (i_to_a, ui_to_a): Add `const` type
	qualifier to function definitions for agreement with prototypes
	in "lib.h".  Drop local copies of prototypes.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Centralize definitions of {U,}INT_DIGITS.

	* src/libs/libgroff/iftoa.c:
	* src/libs/libgroff/itoa.c: Move definitions of `INT_DIGITS` and
	`UINT_DIGITS` from here...
	* src/include/lib.h: ...to here.

	* src/libs/libgroff/iftoa.c:
	* src/libs/libgroff/itoa.c: Preprocessor-include "lib.h".  This
	revealed missing guards around `extern "C"` declarations, so...

	* src/include/lib.h: Add them where necessary.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (OP): Fix code style nits.  Don't quote macro
	arguments unnecessarily.  Use consistent backslashing.  Use
	groff font escape sequence syntax.  Use adjustable non-breaking
	space escape sequence instead of a non-adjustable one.
	Parenthesize numeric expression for better readability.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Make allocator replacement optional.  Switch it
	off by default, relying on C++ runtime new/delete support.

	* configure.ac: Call new `GROFF_USE_GROFF_ALLOCATOR` m4 macro.
	Use `AM_CONDITIONAL` to set Automake variable
	`USE_GROFF_ALLOCATOR` if appropriate.  Report whether the
	allocator is used in configure script output summary.
	* m4/groff.m4 (GROFF_USE_GROFF_ALLOCATOR): Define new macro to
	collect user preference.  The default is off.
	* src/libs/libgroff/libgroff.am (libgroff_a_SOURCES): Build and
	link new.cpp only if we are to `USE_GROFF_ALLOCATOR`.

	* NEWS: Add item.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_TMAC): Report a human-readable message if
	no system tmac prefix is found, instead of leaving the ellipsis
	hanging.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_TMAC): Use separate shell variable for
	`AC_MSG_RESULT()` content since the human-readable string we
	populate it with in the empty case is not appropriate for later
	`AC_SUBST()`-itution.  Problem introduced by me in commit
	19670348, 31 October.

2021-11-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am (MOSTLYCLEANFILES): Remove `$(TMACMDOCFILES)`.
	This variable, formerly named `TMACMDOCSTRIPFILES`, should not
	be used in a clean target because its contents are (no longer)
	generated files.  Problem introduced by me in commit 24602f42, 4
	July (only noticeable in within-source-tree builds).

2021-11-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff,pic]: Check `strdup()` return value.

	* src/libs/libgroff/font.cpp (struct text_file): Add `fatal()`
	member function.
	(text_file::fatal): Implement it.

	* src/libs/libgroff/font.cpp (font::load_desc):
	* src/preproc/pic/troff.cpp (troff_output::set_location): Die if
	`strdup()` returned a null pointer.

2021-11-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/error.cpp (do_error_with_file_and_line):
	Revise to eliminate `fprintf()` calls, which might perform
	dynamic memory allocation, rendering this function unsafe to
	call after memory allocation failures.  Since this function is
	near the top of our diagnostic output call stack, that would be
	unfortunate.  `errprint()` does not use dynamic allocation, nor
	do the `i_to_a()` and `ui_to_a()` functions it calls to format
	integers.

2021-11-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* configure.ac: Add `strdup` to AC_CHECK_FUNCS since we are
	using it and the whole point of libgroff's `strsave()` was to
	get along without it.  But `strdup` has been standardized in
	POSIX for 20 years (SUSv3, POSIX:2001) and is on its way into
	ISO standard C (N2353) and C++ (P2391R0) as well.

2021-11-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/strsave.cpp (strsave): Call `strcpy()` only
	if `malloc()` did not return a null pointer.  Problem noted by
	Ingo Schwarze.

2021-11-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/fontfile.cpp (font::open_file): Don't open
	user-specified font file names with slashes in them; i.e., don't
	traverse directories outside the configured font path.  Also
	refuse to open the file if the `sprintf()` used to construct its
	file name doesn't write the expected quantity of bytes to the
	destination buffer.

	Fixes <https://savannah.gnu.org/bugs/?61424>.  Thanks to Ingo
	Schwarze for feedback.

2021-11-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Regression-test Savannah #61424.

	* src/roff/groff/tests/fp_should_not_traverse_directories.sh: Do
	it.
	* src/roff/groff/tests/artifacts/HONEYPOT: Add test artifact.
	* src/roff/groff/tests/artifacts/devascii/README: ...and this;
	we need a directory to make the test work but empty ones tend to
	look unintentional.
	* src/roff/groff/groff.am (groff_TESTS): Run test.
	(EXTRA_DIST): Ship artifacts.

2021-11-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Fix diagnostic error wording.

	* src/libs/libgroff/font.cpp (font::load): Fix diagnostic
	message; this is issued when an unrecognized directive is
	encountered, so it necessarily occurs _before_ any `charset` or
	`kernpairs` directive.  Give the user a hint accordingly.

2021-11-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix paragraph tag regressions.

	* tmac/an-ext.mac (UR, MR): Only create an environment and
	diversion if we're not already in one of the latter.  If we are
	{in groff man, this occurs only when collecting a `TP` paragraph
	tag}, then typeset the URI as part of the indented paragraph.
	(UE, ME): Pop the diversion and environment stacks only if we
	pushed them in the first place.  Eliminate spurious space in
	post-URI arguments by only typesetting excess macro parameters
	if there were any.

2021-11-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Regression-test Savannah #61425.

	* tmac/tests/an-ext_link-macros-work-in-paragraph-tags.sh: Do
	it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-11-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (DS): Drop a redundant unconditional break; every
	display macro we call in the event of a valid call already
	breaks the line, and it's polite to not break if we're given an
	invalid argument.  Emit a diagnostic error if the argument we're
	given is invalid, and immediately end the diversion we just
	opened.

2021-11-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (environment::set_font): Clarify
	diagnostic warning.

2021-11-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::add_entry): If we see a '\^'
	entry on the first row of a table, it's invalid, but we need to
	create an empty entry in its place.  Otherwise, someone can put
	another '\^' right below the one on the first row, creating a
	reference to a nonexistent table entry and provoking a SEGV.
	Issue an error diagnostic (distinct from the one in
	`do_vspan()`), create the entry, and skip `do_vspan()` (given a
	'^' in a first-row definition, it issues an error diagnostic and
	returns early, which suffices).  Problem appears to date back to
	groff 1.02 (June 1991) at the latest.

	Fixes <https://savannah.gnu.org/bugs/?61417>.

2021-11-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Regression-test Savannah #61417.

	* src/preproc/tbl/tests/\
	do-not-segv-on-invalid-vertical-span-entry.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

2021-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix Savannah #61408.

	* tmac/an.tmac (an-prepare-inner-footer): Don't try to get a
	substring of an empty string; the man page author might not have
	specified a third argument to `TH` (or supplied an empty one).

	Fixes <https://savannah.gnu.org/bugs/?61408>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add regression test for Savannah #61408.

	* tmac/tests/an_inner-footer-abbreviation-works.sh: Do it.

2021-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Tweak computation in URI breaking.

	* tmac/an-ext.tmac (UE, ME): Stop adding the page offset `.o`
	when performing the available horizontal space computation for
	the typeset URI string.  This made no difference on nroff
	devices (grotty; even with `.po 15n`), but it caused the
	breaking decision to be too conservative on troff devices
	{grops}, forcing some URIs that would fit on the current line to
	the next one.

	* tmac/tests/an-ext_UE-breaks-before-long-URIs.sh: Add test of
	URI with no link text, which also has break points after every
	character, so that we detect even slight alterations.

2021-11-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Do more device and font description file validation,
	resolve an assertion failure arising from a negative declared
	device resolution, and correct a documentation error.

	* src/libs/libgroff/font.cpp (font::load): Include more
	information about invalid input in diagnostic messages.
	  - When a kern pair's amount is missing or invalid, report the
	    name of the kern pair.
	  - When someone tries to declare the first entry in the charset
	    section as an alias, report the glyph name.
	  - Identify the token for the unnamed character if an attempt
	    is made to alias it.
	  - When an out-of-range character type is applied to a glyph,
	    name the glyph.
	(font::load_desc): Same.
	  - Drop redundant zero initialization of `res`.
	  - Check all directives that take basic units for positive
	    values, adding `res`, `unitwidth`, `paperwidth`, and
	    `paperlength`.  Update this diagnostic to demand positive,
	    not nonnegative, values.
	  - When the font count is long in a `fonts` directive, report
	    how many font names were declared (and thus expected).  (If
	    the count is short, the next line is read for a font name,
	    like 'tcommand' in our devutf8/DESC.)
	  - When interpreting a `papersize` directive, throw an error
	    and return false if `res` has not yet been encountered,
	    since it is used in subsequent computations.
	  - When a paper format cannot be determined, report the
	    original declared value from the DESC file.  Use `strdup()`
	    to save it since it gets clobbered by the resolving process.
	    `free()` the saved string when we're done, regardless of
	    error condition.

	* doc/groff.texi (Device and Font Files):
	* man/groff_font.5.man (DESC file format): Document additional
	exception to order-indifference of directives: (at least one)
	`res` must precede `papersize`.

	Fixes <https://savannah.gnu.org/bugs/?61414>.

2021-11-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grohtml/post-html.cpp
	(html_printer::do_file_components): Add assertion.

2021-11-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/ps.cpp (usage): Document -p and --version
	options.

2021-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-nroff (doc-setup-page-layout): Set the title
	length to the device line length (register `.l`) if register
	`LT` is not defined.  This keeps the title length from being set
	to 78n when the line length is not, preventing the output from
	looking silly.

2021-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (main): Emit groff code to define
	macro `T&` as empty if it is not already defined.  (All of our
	full-service macro packages [except mdoc(7)] already do this, so
	there's no change in semantics; mom(7) even defines it as an
	empty _string_.)

2021-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/string_case_xform_requests.sh: Migrate
	test to POSIX shell, dropping use of process substitution (a
	Bashism).  Also rewrite to stop using a here document within a
	command substitution, mainly for paranoia.

	* src/roff/groff/tests/string_case_xform_requests.sh:
	* src/roff/groff/tests/on_latin1_device_oq_is_0x27.sh: Update
	shebang lines to use /bin/sh as the interpreter.

2021-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/ps.cpp (encode_subfont): Update assertion to
	check for `sub` parameter being a null pointer rather than
	`sub->glyphs`; the latter is a member array of a `subencoding`
	struct so it can't be a null pointer.  (`glyphs` is an array of
	pointers to `const char`; the _elements_ of the array can [and
	are initialized to] be null pointers, but the address of the
	array itself will never be in a C/C++ implementation.)  Detected
	by Clang 13's "-Wtautological-pointer-compare".

2021-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/new.cpp (delete): Declare `throw()` (no
	exceptions thrown); quiets "-Wimplicit-exception-spec-mismatch"
	from Clang 13.

2021-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4: Fix messaging nits.
	(GROFF_MAKEINFO): Set `missing` to "missing 'makeinfo'" for
	consistency with other assignments to `missing`.
	(GROFF_TMAC): Utter an intelligible result in the configure
	check when no system macro files requiring groff wrapping are
	located.

2021-10-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Handle special character escape sequences that map to
	basic Latin glyphs in device control escape sequences
	consistently among output devices.

	* src/roff/troff/input.cpp (encode_char): Rearrange
	conditionals.  This is the logic that puts the "whatever" within
	a \X'whatever' escape sequence into GNU troff's intermediate
	output.  Handle adjustable and nonadjustable space escape
	sequences ("\~" and \ ") first.  Then, if the token is a special
	character escape sequence, retrieve its "contents" (glyph name).
	Move the basic Latin mapping for the seven glyph names '-',
	'aq', 'dq', 'ga', 'ha', 'rs', and 'ti' here, before checking
	whether the device description issued the
	'use_charnames_in_special' directive.  This way, the 'html' and
	'xhtml' output devices can straightforwardly embed these basic
	Latin characters in device control escapes (notably, "html:",
	for which the present convention is to follow the this tag
	immediately with a literal HTML URI, complete with `<a href>`
	element syntax).  If the special character is none of these and
	we should 'use_charnames_in_special', proceed as groff 1.22.4
	and earlier did.  This is a behavior change, as was my addition
	of this translation mechanism in the first place, so...

	* doc/groff.texi (Postprocessor Access): Document it.

	* src/roff/groff/tests/\
	device_control_escapes_express_basic_latin.sh: Test it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?61401>.

2021-10-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Map \[ti] correctly in device control escape sequences.

	* src/roff/troff/input.cpp (encode_char): Fix copy-and-paste
	error.  \[ti] should put '~', not '^', into a device control
	command.

	Fixes <https://savannah.gnu.org/bugs/?61403>; problem introduced
	by me in commit 9d61b3d1, 1 October.

2021-10-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Handle degenerate input quietly.

	* tmac/an.tmac (TH): Define new register `an-TH-was-called`.
	(an-end): Return immediately if that register is not defined;
	to format the default page footer we must have the information
	declared in a valid `TH` call.  (`TH` also initializes the type
	size and baseline spacing registers we use to prepare the page
	footer environment.)  If the register _is_ defined, remove it
	just prior to the end of this macro definition, in preparation
	for next page to be rendered.

	* tmac/tests/an_handle-degenerate-input-quietly.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/61402>, a regression from
	groff 1.22.4 (problem introduced by me in the course of many
	changes to trap management and header/footer handling to work
	nicely in batch rendering with -mandoc and mdoc(7) documents).

2021-10-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Warn if `TE` table macro called but `TW` register (set by
	tbl(1)) undefined.  Arrange it so that we warn only once per
	man(7) document, not per table region.

	* tmac/an.tmac (TH): Remove `TW` register when processing new
	document and clear `an-was-tbl-failure-reported` register.
	(TE): Check `TW` and `an-was-tbl-failure-reported` registers; if
	the former is undefined and the latter false, emit the message
	and set `an-was-tbl-failure-reported`.

	Addresses part of <https://savannah.gnu.org/bugs/?61379>.
	Thanks to Bjarni Ingi Gislason for the suggestion.

2021-10-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Improve portability.

	* src/devices/grotty/tests/osc8_works.sh: Fix typo in test.
	Multiple regex quantifiers after an atom were not flagged with a
	diagnostic by GNU grep 3.3, but were by BSD grep 2.5.1-FreeBSD.

	* src/roff/groff/tests/smoke-test_html_device.sh: Stop trying to
	set $LC_CTYPE to "C.UTF-8"; some systems don't support this
	expediency.  Skip the test if the tester hasn't configured the
	environment adequately.

	* tmac/tests/s_TC-works-with-percent-in-custom-titles.sh: Fix
	portability problems exposed by FreeBSD sed (which version is
	unclear).  {1} Use POSIX BREs, dropping use of '+' quantifier.
	{2} Add semicolons to terminate commands before braces on the
	same line.  Simplify surrounding test structure.
	* tmac/tests/e_footnotes-work-with-columns.sh: Fix same two sed
	problems.
	* tmac/tests/andoc_flush-between-packages.sh:
	* tmac/tests/doc_accept-mixed-case-section-headings.sh:
	* tmac/tests/an_TS-do-not-keep-tables-when-cR-set.sh: Fix same
	sed semicolon problem.

	* src/roff/groff/tests/on_latin1_device_oq_is_0x27.sh: Rewrite
	test to stop using a here document (containing an unpaired
	single quote) inside a command substitution, which is broken in
	GNU Bash 3.2 and some other versions.  Instead construct the
	input with printf(1).  Also gets rid of a Bashism (process
	substitution) that Ingo pointed out years ago.
	* src/utils/grog/tests/recognize-perl-pod.sh: Same problem,
	different solution.  The Perl POD output is far too large to
	construct programmatically, so move it into an external file...
	* src/utils/grog/tests/foo.man: ...here.
	* src/utils/grog/grog.am (EXTRA_DIST): Ship new test artifact.

2021-10-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Make sed-based insertion of `lf` requests more
	portable: a dance is required to embed a literal newline inside
	a sed expression inside a shell command executed as part of a
	Make target rule.  We assume that neither the POSIX shell $''
	operator nor a working printf(1) is available.
	(DOC_GROFF): Define a shell variable containing a literal
	newline, evading make(1) and echo(1)'s valiant attempts to
	consume it.
	(doc/pic.html, doc/webpage.html): Repeat trick, slightly
	modified since the dependency needs to be manually identified.

	Solution adapted from the GNU Autoconf manual, "Newlines in Make
	Rules".

	Fixes <https://savannah.gnu.org/bugs/?61265>.  Thanks to John
	Gardner for the report.

2021-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TH): Stop populating `an-extra3` (the default
	center header) if the section argument is "3p".  "3p" does not
	always mean a Perl-related man page; Debian- and Arch
	Linux-based systems[1][2] (at least) have long used a "3perl"
	suffix, while OpenBSD appears to still use "3p" for Perl[3],
	which is also used by the POSIX man page distribution[4].
	Fortunately, Perl and POSIX are reliable at providing a fifth
	argument to `TH` anyway, so our fallback is as unnecessary as it
	is non-impartial.
	* tmac/groff_man.7.man.in (Document structure macros) <TH>:
	De-document the above behavior.

	[1] https://manpages.debian.org/bullseye/perl-doc/\
	Pod::Man.3perl.en.html
	[2] https://man.archlinux.org/man/Pod::Man.3perl
	[3] https://man.openbsd.org/man3p/Pod::Man.3p
	[4] https://man7.org/linux/man-pages/man3/system.3p.html

2021-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Abbreviate the inside footer if necessary.

	* tmac/an.tmac (an-prepare-inner-footer): Prevent the inside
	footer from overrunning the center footer.
	(BT): Use new string `an-ifoot` instead of `an-extra2` in page
	footers.

	Fixes <https://savannah.gnu.org/bugs/?61386>.

2021-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #61386.

	* tmac/tests/an_inner-footer-abbreviation-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_char.7.man (Description, Special character escape
	forms): Document the `\C` escape sequence.  Fix error: \[a] is
	_not_ "translated to \a, the uninterpreted leader escape
	sequence," but requests a glyph _named_ '\a' internally--it
	appears thus in diagnostic messages and, importantly, in the
	font description files defining special character glyph names.

2021-10-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac: Refactor to reduce repetition.
	(an-break-paragraph): New macro handles paragraph-breaking tasks
	previously duplicated.
	(SH, SS, P, TP, IP, HP): Call it rather than issuing its
	constituent requests.

2021-10-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (TP): Reset type size, vertical spacing, and font
	to defaults before setting the new paragraph.

	Fixes <https://savannah.gnu.org/bugs/?61380>.

2021-10-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Auto-increment): Fix error; the `\R` escape
	sequence does _not_ support an auto-incrementation amount.
	* man/groff_out.5.man (Command reference/Simple commands): Fix
	erroneous claim: 'N' is not a GNU roff extension; it appears on
	page 27 of CSTR#54 (1992).

2021-10-24  Keith Marshall  <keith.d.marshall@ntlworld.com>

	[ms]: Provide global default XH and XN implementations.

	cf. <https://savannah.gnu.org/bugs/?58946#comment13>

	* tmac/s.tmac (XH-INIT, XN-INIT, XH-UPDATE-TOC)
	(XH, XN, XH-REPLACEMENT, XN-REPLACEMENT): Implement them, and...
	* tmac/groff_ms.7.man: ...document them.

2021-10-24  Keith Marshall  <keith.d.marshall@ntlworld.com>

	[ms]: Fix misleading NH macro indentation.

	* tmac/s.tmac (@NH) [.T is html]: .if statement should exhibit
	same indentation as preceding .DEVTAG-NH statement, but is
	overindented; fix it.

2021-10-23  Keith Marshall  <keith.d.marshall@ntlworld.com>

	[ms]: Defend against uncontrolled page trap recursion.

	* tmac/s.tmac (pg@top) [HM+FM+.V>.p]: Diagnose insufficient page
	length, and abort; cf. <https://savannah.gnu.org/bugs/?61294>

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[groff]: Fix code style nits.

	* src/roff/groff/groff.cpp (main, help): Use standard C library
	preprocessor symbols `EXIT_SUCCESS` and `EXIT_FAILURE` instead
	of 0 and 1 literals, respectively.  See commit fa4c27e9, 7
	September.
	(main): Replace `assert(0)` with a communicative predicate.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tty.cpp (tty_printer::special_link):
	Eliminate casts by retyping `uri` and `pair` to pointers to
	`const char`s.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am: Build more quietly.
	(tmac/stamp-wrap): Prefix all rule commands with `$(AM_V_at)`;
	since this target is a stamp file instead of a useful artifact
	to be distributed, make its creation completely silent by
	default.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/troff.am: Build more robustly.
	(src/roff/troff/majorminor.cpp): Drop progress-reporting `echo`
	in favor of prefixing final rule command with `$(AM_V_GEN)`.
	Prefix earlier rule commands with `$(AM_V_at)`.  Use `printf`
	instead of `echo` to build the file, and create a temporary file
	at first so that we don't race with the compiler on parallelized
	builds.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/eqn.am (neqn): Simplify: drop removal of
	target prior to overwriting it; any system we can build groff on
	should have a shell that implements the clobbering semantics of
	the POSIX shell '>' operator.  (If this isn't true, we have
	_many_ other target rules in our build to which we must add
	prefatory `$(RM)`s, or I miss my guess.)

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/libgroff.am: Build more quietly and
	robustly.
	(src/libs/libgroff/version.cpp): Drop progress-reporting `echo`
	in favor of prefixing final rule command with `$(AM_V_GEN)`.
	Prefix earlier rule commands with `$(AM_V_at)`.  Use `printf`
	instead of `echo` to build the file, and create a temporary file
	at first so that we don't race with the compiler on parallelized
	builds.  Drop nilpotent sed transformation; this looks like a
	relic of past times when we'd drop a trailing ".0" from the
	version number stored in the C symbol `Version_string`.
	(charset.alias, ref-del.sed, ref-add.sed): Prefix rule command
	with `$(AM_V_GEN)`.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/xditview/xditview.am: Build more quietly.
	(src/devices/xditview/GXditview-ad.h): Drop progress-reporting
	`echo` in favor of prefixing rule command with `$(AM_V_GEN)`.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/devpdf.am: Build more quietly.
	(font/devpdf/enc/text.enc, font/devpdf/map/symbolmap,
	$(DEVPDFFONTMAP_1)): Prefix all rule commands with
	`$(AM_V_at)`; since these are all `mkdir`s and `cp`s, I reason
	that little can go wrong with them that won't be disclosed by
	these tools' own diagnostic messages, so they are insignificant
	from a perspective of build progress.

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Build more quietly.
	(doc/examples.stamp): Prefix all rule commands with
	`$(AM_V_at)`; since this target is a stamp file instead of
	a useful artifact to be distributed, make its creation
	completely silent by default.
	(doc/groff.info, .texi.txt): Prefix directory creation with
	`$(AM_V_at)` and `makeinfo` command with `$(AM_V_GEN)`.
	(.texi.dvi, .texi.pdf): Prefix directory creation with
	`$(AM_V_at)` and `makeinfo` command with `$(AM_V_GEN)`.  Send
	diagnostic message to standard error if `texi2dvi` is
	unavailable.
	(.texi.html): Prefix directory creation with
	`$(AM_V_at)`.  Two HTML versions are produced, in split and
	unsplit versions; prefix one `makeinfo` command with
	`$(AM_V_GEN)` and the other with `$(AM_V_at)` so that only one
	message is produced.
	(gnu.eps): Drop useless/noisy `echo` command.  Prefix copy
	operation with `$(AM_V_at)`.  Send diagnostic messages to
	standard error if there are problems with the Netpbm tools.

	(MOSTLYCLEANFILES): The `mostlyclean` target was leaving a file,
	`groff.info-3`, behind in the build tree.  At some point our
	Texinfo manual grew beyond earlier expectations.  Use a glob
	`[0-9]` instead (giving a hostage to fortune that `makeinfo`
	will never split our manual into more than nine chunks).

2021-10-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* arch/misc/misc.am:
	(arch_shdeps_sh): Pull file name into a new variable.
	(EXTRA_DIST, shdeps.sed): Use it.
	(shdeps.sed): Build more quietly; prefix with `$(AM_GEN_V)`.

2021-10-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[nroff]: Support groff's -R flag to run refer(1).

	There's no reason not to support calling `refer` with nroff-mode
	documents; typographically, it's less demanding than tbl(1).
	GNU troff(1) supports an incompatible `-R` flag to suppress the
	reading of troffrc{,-end} files, but this is likely not the `-R`
	that users will want--it is most useful for troubleshooting
	troff, and nroff already unconditionally loads a macro file
	{tty-char.tmac}.

	* src/roff/nroff/nroff.sh: Do it.

	* src/roff/nroff/nroff.1.man:
	* NEWS: Document it.

2021-10-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am (tmac/groff_man.7.man)
	(tmac/groff_man_style.7.man): Be quieter by default; use
	$(AM_V_GEN) more consistently with the rest of the build.

2021-10-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_error): Format diagnostic
	messages in closer alignment with GNU Coding Standards: don't
	introduce a space between the program name and the input file
	name.

	* src/roff/groff/tests/string_case_xform_errors.sh: Update
	expected output.

2021-10-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (distribute_space): Revert an
	`assert()` I added in commit b93eacd8d7 (5 September); we can
	indeed reach this code with a negative amount of desired space,
	and in fact the "show hyphenation points" trick
	<https://froude.eu/groff/examples/hyphenation-points.html>
	relies upon it.  Add explanatory comment.

	Fixes <https://savannah.gnu.org/bugs/?61348>.

2021-10-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* test-groff.in: Add support for sboxes.tmac.

2021-10-11  Paul Eggert <eggert@cs.ucla.edu>

	Include <config.h> before any standard headers.

	Gnulib requires that files that might use Gnulib features (which
	pretty much means every C or C++ source file) must include
	<config.h> first.  Arrange for that.  This will be needed once
	Groff updates to the latest Gnulib; see Bjarni Ingi Gislason's
	problem report in:
	<https://lists.gnu.org/r/bug-gnulib/2021-10/msg00008.html>

	The only exception I can see is src/utils/addftinfo/guess.cpp,
	which does not include any standard include file either directly
	or indirectly, and so need not include <config.h>.

	* src/devices/xditview/Dvi.c:
	* src/devices/xditview/font.c:
	* src/devices/xditview/lex.c:
	* src/devices/xditview/page.c:
	* src/devices/xditview/parse.c:
	* src/libs/libbib/map.c:
	* src/libs/libgroff/change_lf.cpp:
	* src/libs/libgroff/cmap.cpp:
	* src/libs/libgroff/cset.cpp:
	* src/libs/libgroff/fmod.c:
	* src/libs/libgroff/getcwd.c:
	* src/libs/libgroff/lf.cpp:
	* src/libs/libgroff/ptable.cpp:
	* src/libs/libgroff/quotearg.c:
	* src/libs/libxutil/DviChar.c:
	* src/libs/libxutil/XFontName.c:
	* src/libs/libxutil/xmalloc.c:
	* src/utils/indxbib/signal.c: Do it.

	[Fixes <https://savannah.gnu.org/bugs/?61315>. --GBR]

2021-10-10  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Handle pdfs > v1.4 loaded by \X'pdf: pdfpic'.

	* src/devices/gropdf/gropdf.pl: Improve loading of pdfs above
	version 1.4, i.e. handle compressed nodes in /ObjStm. Also
	improve code in \X'pdf: import'.

2021-10-10  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Add new background boxes to gropdf.

	* src/devices/gropdf/gropdf.pl: New \X'pdf: background' command.
	* tmac/pdf.tmac: Covenience command .pdfbackground added.
	* contrib/sboxes/: Files which demonstrate use of background
	boxes using -ms macros.

2021-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Fix portability problems in 2 tests.

	* src/roff/groff/tests/break_zero-length_output_line_sanely.sh:
	* tmac/tests/s_PN-works.sh: Migrate from `echo` to `printf` for
	test inputs containing backslashes to be interpreted literally.

	Fixes part of <https://savannah.gnu.org/bugs/?61302>.  Thanks to
	Deri James for identifying the problem.

2021-10-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Slightly refactor.

	* src/devices/grotty/tty.cpp: Boolify.  Demote numerous
	variables (and one return type) from `int` to `bool`, use
	Boolean instead of integer literals with them, and give the
	variables names resembling logical predicates.
	 - horizontal_tab_flag -> want_horizontal_tabs
	 - form_feed_flag -> want_form_feeds
	 - bold_flag_option -> want_emboldening_by_overstriking
	 - bold_flag -> do_bold
	 - underline_flag_option -> want_italics_by_underlining
	 - underline_flag -> do_underline
	 - overstrike_flag -> want_glyph_composition_by_overstriking
	 - draw_flag -> allow_drawing_commands
	 - italic_flag_option -> want_sgr_italics
	 - italic_flag -> do_sgr_italics
	 - reverse_flag_option -> want_reverse_video_for_italics
	 - reverse_flag -> do_reverse_video
	 - old_drawing_scheme -> use_overstriking_drawing_scheme
	(class tty_printer:printer): Similarly.
	 - is_underline -> is_underlining
	 - is_bold -> is_boldfacing
	 - cu_flag -> is_continuously_underlining
	(tty_printer::tty_color): Demote return type as above.  Invert
	its sense; rename `unknown_color` to `is_known_color`.
	(tty_printer::color_to_idx): Invert sense of test at
	`tty_color()` call site.

2021-10-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Finish documenting new `TC-MARGIN` register and
	`TC-LEADER` special character.

	Fixes <https://savannah.gnu.org/bugs/?61157>.

2021-10-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Slightly refactor.

	* src/devices/grotty/tty.cpp (tty_printer::special_link): Use
	consistent loop styles and drop unnecessary arithmetic.

2021-10-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix oversight and improve `MR` test.

	* tmac/an-ext.tmac (initialization): Enable `mY` register to
	indicate use of grotty(1) (and therefore OSC 8 support) if the
	"ascii", "cp1047", or "latin1" output devices are used, not just
	"utf8".

	* tmac/tests/an_MR-works.sh: Drop copy-and-paste cruft from a
	different test.  Update expected output and check for the
	presence of "link" device control subcommands, not just correct
	font selections.

2021-10-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add `MR` macro for man page cross references.

	* tmac/an.tmac (an-prepare-page-title): After a possibly
	abbreviated man page title is determined, redefine `an-pageref`
	to set the title portion in the font stored in the `MF` string
	and bracket it with italic corrections if that font is thought
	to be oblique.
	(MR): Add macro to format the text of a man page cross
	reference, and hyperlink it on HTML and terminal output devices
	if permitted by the `U` register.
	(initialization): Define `MF` string as `I` if not already set.
	Define `an-lic` and `an-ic` strings as either empty or as
	containing italic corrections.

	* tmac/an-ext.tmac (MR): If the formatter is not GNU troff,
	define macro to format the text of a man page cross reference.

	* tmac/groff_man.7.man.in: Document it.
	(Description): Add macro to summary table.
	(Description/Hyperlink macros): Document new feature.  Note
	origin in Plan 9 troff.  [style] Add examples of use.
	(Description/Font style macros): Drop man page cross references
	from list of items whose typeface conventions are disputed,
	since we have a semantic macro now and a configurable means of
	resolving the problem.
	(History): Add `MR` item.
	(Options) <MF>: Document new string.
	(Files) <an-ext.tmac>: Revise discussion to accommodate `MR`.
	(Authors): Add myself an author of extension macros.

	* tmac/tests/an_MR-works.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	* NEWS: Add item.

2021-10-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (SH, SS): Invoke `ne` request _before_ performing
	font remapping: any page-breaking decision will be taken before
	the remapping happens, and so won't be in effect across a page
	boundary, undesirably impacting header and footer text.

	Fixes <https://savannah.gnu.org/bugs/?61279>.

2021-10-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	Regression-test Savannah #61279.

	* tmac/tests/an_font-remapping-does-not-affect-titles.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-10-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (an-abbreviate-title): Rename to...
	(an-prepare-page-title): ...this.

2021-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Correct erroneous claim: the ".NH S" extension to ms(7)
	comes from 4.2BSD, not GNU.

2021-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/ms.ms (Creating a table of contents): Sync with recent
	additions to groff_ms(7), expand, and heavily revise.

2021-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[andoc,man,mdoc]: Fix Savannah #61266.  Resolve problems in
	batch rendering of man pages to PDF arising from entanglement
	of end-of-input traps, page location traps, continuous rendering
	mode, and andoc's reloading of the (m)an and (m)doc packages.

	* tmac/andoc.tmac (reload-doc, reload-man): Remove end-of-input
	traps alongside others.

	* tmac/an.tmac (an-end): Only perform flush and "manual" page
	footer placement if in continuous rendering mode, since this
	macro is not only called by a trap placed only in continuous
	rendering mode, but also by andoc when changing macro packages.
	Unconditionally remove the `an-header` trap since the next
	document might be using a different macro package.

	* tmac/mdoc/doc-common: In initialization, set flag indicating
	that manual header placement will be required.
	(Dt): Call `doc-setup-header` (which sets up several types of
	trap) unconditionally, and break the page if the vertical
	drawing position is anywhere but at the top.
	(Os): If the package has just been initialized, call
	`doc-header` to force the page header to be written.
	(doc-end-macro): Remove `doc-header` trap since the next
	document might be using a different macro package.  Break the
	page.  Set flag indicating that manual header placement will be
	required for the next document.

	* tmac/mdoc/doc-ditroff (doc-setup-header): Only set page
	location traps for the header and footer if not continuously
	rendering.
	* tmac/mdoc/doc-nroff (doc-setup-header): Stop calling
	`doc-header` here if continuously rendering.  Emit an
	unconditional break.  Except for the location of the footer
	trap, the `doc-setup-header` implementations are now identical.

	Refactoring is needed: some macros and registers have misleading
	names, there is some code duplication in mdoc, and some of the
	trap management problems are solved in slightly different ways
	in man(7) and mdoc(7), perhaps unnecessarily.  We also need some
	test scripts to protect us from regressions.  But this fixes the
	rendering problems.

	Fixes <https://savannah.gnu.org/bugs/?61266>.

2021-10-02  Keith Marshall  <keith.d.marshall@ntlworld.com>

	Correct manpage typo/inconsistency.

	* tmac/groff_ms.7.man (TC_LEADER, TC_MARGIN): Correct; should
	be...
	(TC\-LEADER, TC\-MARGIN): ...respectively, for consistency
	with...
	* tmac/s.tmac (TC-LEADER, TC-MARGIN): ...these.

2021-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (encode_char): Update diagnostic
	messages to not presume the identity of the escape character;
	continues 9be3f8e3 (4 June).

2021-10-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/tty.cpp (tty_printer:special_link): Tighten
	code slightly by taking advantage of preprocessor string literal
	concatenation.

2021-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix `U` enablement override so it actually works the way
	I had in mind.
	- The package proper enables it by default, but
	- the sample site configuration file switches it off, on the
	  assumption that distributors and users will know better than
	  we do when they get a capable pager in place, and
	- a register setting at the command line (or otherwise prior to
	  the loading of the macro package) is dispositive.

	* tmac/an-ext.tmac: Rename URI output device capability register
	from `U` to `mU`.
	(UR, UE, MT, ME): Test both `U` and `mU` before handling
	hyperlinks specially.
	* tmac/an.tmac: If `man.local` did not initialize `U`, switch it
	on.  The hope is that we can drop the stuff in `man.local`
	completely at some point.
	* tman/man.local: Only initialize `U` if it is not already
	defined.

2021-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Use OSC 8 hyperlinks.

	* tmac/an-ext.tmac: Add registers `mY` (output driver is
	"grotty") and `U` (generate hyperlinks).  `U` is intended to
	apply to hyperlinking support in general, not just grotty's OSC
	8 feature.  If the output driver is either grohtml or grotty,
	make `U` true (`man.local` is read subsequently and can override
	it).
	(UR, MT): Conditionalize diversion production on hyperlink
	support, not grohtml use per se.
	(UE, ME): Generate device control commands for `tty` device to
	emit hyperlinks.

	* tmac/groff_man.7.man.in (Options): Document -rU.
	(Files) [style]: Add example of `U` register enablement.

	* tmac/man.local: Disable `U` register by default, except on the
	`html` device.

	* NEWS: Add item.

2021-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grotty]: Add OSC 8 hyperlink support.

	* src/devices/grotty/tty.cpp: Do it.  Define `OSC` (Operating
	System Command) and `ST` (String Terminator) preprocessor
	symbols for these ECMA-48 (ISO 6429) character sequences.
	(tty_printer::simple_add_char): Add stripped-down alternative to
	`add_char()` member function for cases where we want to use many
	defaults because we're writing a terminal escape sequence, not
	rendering a glyph.  (A function like `add_char()` that takes 8
	arguments of varying types is a code smell--phew!)
	(tty_printer::special): Call `special_link()` member function if
	the device control command is `link`.
	(tty_printer::special_link): Add new member function to generate
	OSC 8 hyperlinks.

	* src/devices/grotty/grotty.1.man: Document it.  Observe in
	multiple places that disablement of SGR escape sequences
	disables OSC 8 too.

	* src/devices/grotty/tests/osc8_works.sh: Test it.
	* src/devices/grotty/grotty.am (TESTS, grotty_TESTS): Run test.
	(EXTRA_DIST): Ship test.

	* NEWS: Add item.

	Fixes <https://savannah.gnu.org/bugs/?60666>.  Thanks to Steffen
	Nurpmeso for supplying a proof-of-concept.  (I went with my own
	implementation, though, so blame me if it breaks.)

2021-10-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Convert special character glyphs corresponding to
	Unicode Basic Latin ("ASCII") code points to those code points
	when they occur in device escapes.  (They should be correct for
	IBM code page 1047 as well, but this is untested.)  This is
	necessary for encoding URLs in device control commands.  Special
	character identifiers are presumed to be the defaults documented
	in groff_char(7); this is a design gap that we should consider
	addressing.  (We don't have a way to ask "is this the special
	character corresponding to Unicode basic Latin code point X?")

	* src/roff/troff/input.cpp (encode_char): Do it.

2021-09-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man, mdoc]: Draw line after each page more consistently in
	continuous rendering mode.

	* tmac/an.tmac (an-bp): Move responsibility for line-drawing
	after each document from here...
	(an-end): ...to here.  Refactor; drop
	`an-do-draw-line-after-document` register in favor of testing
	`\n[.F]` for nullity; if it is not null, then another document
	is due to be processed (in fact, `.F` already contains its file
	name), and we need to draw a separating line.  If it is null, we
	have reached the end of input and none is necessary.

	* tmac/mdoc/doc-ditroff.tmac (doc-setup-page-layout):
	* tmac/mdoc/doc-nroff.tmac (doc-setup-page-layout): Save
	configured line length in new register `doc-line-length`.
	* tmac/mdoc/doc-common.tmac (doc-end-macro): Port the above
	man(7) feature to mdoc(7); draw a line of this length after each
	document if continuously rendering.

2021-10-01  Keith Marshall  <keith.d.marshall@ntlworld.com>

	[ms]: Update footnote handling documentation.

	* tmac/groff_ms.7.man: Make some linguistic style adjustments.
	(FP): Document it; see <https://savannah.gnu.org/bugs/?61022>.
	(FS-MARK): Likewise, document this recently added feature.

2021-10-01  Keith Marshall  <keith.d.marshall@ntlworld.com>

	[ms]: Support user-defined TOC leader style.

	* tmac/s.tmac (toc*leader-char): Rename it as...
	(TC-LEADER): ...this; within PX, leave it unchanged, if
	predefined.
	(TC-MARGIN): New numeric register; if predefined, leave it
	unchanged, otherwise define as \w'000'; use it instead of
	hard-wired definition, within PX; see
	<https://savannah.gnu.org/bugs/?61157>.

	* tmac/groff_ms.7.man (TC-LEADER, TC-MARGIN): Document them.

2021-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[pic]: Update input file name correctly.

	* src/preproc/pic/troff.cpp (troff_output::set_location): Copy
	the inbound file name argument with `strdup()` and store pointer
	to this copy in `last_filename` instead of aliasing argument.
	(troff_output::~troff_output): `free()` the memory allocated by
	`strdup()` in destructor.

	Fixes <https://savannah.gnu.org/bugs/?61206>.  Pointer
	assignment instead of a string copy was being performed, which
	means that after its initial assignment, `last_filename` always
	shared its value ultimately with the `current_filename` pointer
	{a libgroff symbol}, so `strcmp()` was always being performed on
	identical pointers.  Problem appears to date back 30+ years, to
	the dawn of our repo history.

2021-09-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devlj4/S: Make font name consistent with file name.

2021-09-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/font.cpp (font::load): Throw error if a font
	description file is missing a `spacewidth` directive, since it
	is now re-documented as mandatory.  Atypically, we don't return
	false in this scenario; instead we proceed with the existing
	logic to compute a space width for the font based on typical
	practices for Western alphabetic fonts (see, e.g.,
	<https://type.today/en/journal/spaces>.

	* font/devdvi/EX:
	* font/devdvi/MI:
	* font/devdvi/S:
	* font/devdvi/SA:
	* font/devps/EURO: Add `spacewidth` directive to font
	description files we ship that were missing it.  We use the same
	values that libgroff would have computed, so there should be no
	visible difference.

2021-09-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am: Mark `$(TEST_SUITE_LOG)` as `.PRECIOUS`.  This
	prevents the test suite log from being deleted if there are any
	failures.

	Fixes <https://savannah.gnu.org/bugs/?61213>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (do_line): Move first-macro-call test
	for `TH` to a more appropriate location.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Refactor to make it easier to generalize a per-package
	scoring mechanism.

	* src/utils/grog/grog.pl: Convert `inferred_main_package` from
	scalar to list.  Add scalar `selected_main_package` to store a
	"winner" from the list of main packages inferred.
	(push_main_package): Add subroutine to populate
	`inferred_main_package`.
	(do_line, infer_man_or_ms_package): Update to use
	`push_main_package`.
	(construct_command): Rewrite to select a main package from the
	list `inferred_main_package`, taking user-supplied arguments
	into account as an overriding factor.  Drop now-unused `msupp`
	list.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp (main): If the `-I` option is given,
	run the grn preprocessor and pass it an `-M` option with `-I`'s
	argument.

	* NEWS:
	* src/roff/groff/groff.1.man (Options): Document it.  Also
	document that `-I` options are passed to the output driver.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (do_line): Don't strip groff-style
	comments \# if AT&T compatibility mode is enabled.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Perform more font description file validation.  Our
	documentation said that the `name` directive was mandatory but
	we didn't actually enforce this.  Also be more specific in our
	complaints of ill-formedness.

	* src/libs/libgroff/font.cpp (font::load): Add local Boolean
	variable `saw_name_directive`.  Rename `had_charset` to
	`saw_charset_directive` for symmetry.  Emit distinct diagnostics
	for `spacewidth` and `slant` directives having a missing,
	non-numeric, or out-of-range argument.  Emit diagnostic if the
	file lacks a `name` directive.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Slightly refactor.

	* src/libs/libgroff/font.cpp (struct text_file): Rename member
	variable `size` to `linebufsize` for clarity (it's certainly not
	the size of the text file).
	(text_file::text_file): Initialize `linebufsize` in constructor.
	(text_file::next_line): Allocate new `buf` using `linebufsize`
	instead of magic number (which was also stored to `size`, making
	it only semi-magic, I guess).  Rename local variable `i` to
	`length` since it is in fact the length (in `char`s) of the
	string stored in `buf`.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Revisit fix for Savannah #61173.

	* src/libs/libgroff/font.cpp (text_file::text_file): Restore
	setting of `lineno` member variable to `0` in constructor
	initializer list, but...
	(text_file::next_line): ...unconditionally increment it every
	time through this member function's outer loop.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Align diagnostic message format with libgroff.

	* src/roff/troff/input.cpp (fatal_with_file_and_line): Report
	the program name if one is defined.
	(fatal_with_file_and_line, error_with_file_and_line,
	debug_with_file_and_line): Report the line number of the input
	file only if it is positive, so that other values can be used
	for "whole file" complaints.  See commit cd0457b6, 17 September.

2021-09-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop redundant diagnostic.

	* src/libs/libgroff/font.cpp (font::load): Drop redundant
	diagnostic; a missing `charset` directive is already checked for
	later, circa line 998.

2021-09-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Fix code style nits.

	* src/libs/libgroff/font.cpp (font::font): Use initializer list
	as much as possible in constructor.
	(font::unit_scale, font::get_width, font::get_height,
	font::get_depth, font::get_italic_correction,
	font::get_left_italic_correction,
	font::get_subscript_correction, font::get_character_type,
	font::get_code, font::get_special_device_encoding): These member
	functions rely on the font being either indexed or associated
	with an output device that uses the `unicode` directive in its
	`DESC` file.  The compiler doesn't know this, so annotate the
	`abort()` calls that conclude them.  Add an `assert()` before
	each one to more usefully describe the violated invariant in the
	event this unreachable code is somehow reached.
	(font::get_width): Annotate special meaning of zero zoom factor.

2021-09-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/include/font.h (UNDEFINED_GLYPH): Use idiomatic C++98 null
	pointer constant.

2021-09-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix compiler warning and dead store.

	* src/devices/grohtml/post-html.cpp (html_printer::special):
	Update call of `font::load_font()` to stop passing obsolete
	parameter (deleted by me in 2dff87d3, 17 September).  The value
	stored to the parameter by that function was never read anyway,
	so also get rid of the variable that contained it.

	Fixes <https://savannah.gnu.org/bugs/?61187>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-09-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Slightly refactor.

	* src/include/font.h (font::scan_papersize): Demote return type
	from `int` to `bool`.
	* src/libs/libgroff/font.cpp (font::scan_papersize): As above.
	Use Boolean instead of integer literals.  Also rename `FILE`
	stream pointer from `f` to `fp` and perform an explicit
	comparison against the idiomatic C++98 null pointer constant.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff, troff]: Slightly refactor device and font description
	file loading.  Remove dead code.

	* src/include/font.h (font::load_font): Drop second parameter.
	It was never used for its intended purpose.
	(load): Drop first parameter; likewise.
	* src/libs/libgroff/font.cpp (font::load, load): As above.

	* src/libs/libgroff/font.cpp (struct text_file): Rename
	`skip_comments` to `recognize_comments`.  Demote that and
	`silent` from `int` to `bool`.
	(text_file::text_file): Use Boolean rather than integer literals
	in constructor.
	(text_file::next_line, font::load): Apply above renaming.

	* src/libs/libgroff/font.cpp (font::load): Rename parameter from
	`head_only` to `load_header_only` to be more communicative.
	Drop test of font description file name being `DESC`; this code
	was not being reached.  Stop throwing errors from this function
	on failure to open the file; the caller will handle this when it
	sees our false return value.  Rename local variable `command` to
	`directive` for alignment with our documentation.  Replace "I
	dont think this should happen" test and comment with `assert()`.
	(struct table): Rename member from `command` to
	`numeric_directive` to indicate its specificity, tracking only a
	subset of valid `DESC` file directives.

	* src/libs/libgroff/font.cpp (font::load, font::load_desc):
	Remove redundant assignments to the member variable formerly
	known as `skip_comments`.

	* src/libs/libgroff/font.cpp (font::load_desc): Rename local
	variable `directive_found` to `numeric_directive_found` to
	clarify logic.

	* src/roff/troff/node.cpp (mount_font_no_translate): Simplify
	call of `font::load_font`.  The `not_found` in-out parameter
	which was so agonizingly passed up through layers of library
	calls was never actually read.  Drop code that has been `#if
	0`-ed out since 1993.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/font.cpp (font::load_desc): Clear line
	number before emitting whole-file validity diagnostics.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/font.cpp (font::load_desc): Emit correct
	line numbers when complaining of invalid `sizescale`, `hor`, or
	`vert` values in device description files.

	Fixes <https://savannah.gnu.org/bugs/?61174>.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Increase validation of device and font description
	files.

	* src/libs/libgroff/font.cpp (font::load): Validate the syntax
	and value of the `name` directive.
	(font::load_desc): Issue distinct diagnostics for a `fonts`
	directive that is missing arguments and for a first argument
	that can't be interpreted as a valid number.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Make error reporting more flexible.

	* src/libs/libgroff/error.cpp (do_error_with_file_and_line):
	Interpret a nonpositive line number specially: treat the
	diagnostic as applying to the entire file, and omit the line
	number.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Add information to diagnostics.

	* src/libs/libgroff/font.cpp (font::load): Drop unused argument
	from `error()` call.
	(font::load_desc): In another, add name of numeric directive
	that is given an unparsable number.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Tweak code style.

	* src/libs/libgroff/font.cpp (trim_args, font::load)
	(font::load_desc): Compare pointer explicitly to null pointer
	literal `0` instead of using logical complementation.
	(font::load, font::load_desc): Swap order of null pointer
	equality comparisons when a typo or thinko could lead to lvalue
	assignment.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Use idiomatic C++98 null pointer constant.

	* src/libs/libgroff/font.cpp (text_file::error)
	(glyph_to_unicode, font::get_special_device_encoding)
	(font::load):
	* src/libs/libgroff/fontfile.cpp (font::image_generator):
	* src/libs/libgroff/nametoindex.cpp (class charinfo)
	(character_indexer::named_char_glyph)
	(character_indexer::numbered_char_glyph):
	* src/libs/libgroff/string.cpp (string::clear):
	* src/libs/libgroff/tmpfile.cpp (temp_init::temp_init):
	* src/libs/libgroff/tmpname.cpp (gen_tempname): Use `0` literal
	instead of `NULL` to represent a null pointer; this was
	idiomatic in C++98 and is mostly the practice elsewhere in
	groff.  Also swap order of null pointer equality comparisons
	when a typo or thinko could lead to lvalue assignment.

	* src/roff/troff/input.cpp (input_stack::diversion_state)
	(input_stack::get_diversion_state, charinfo::contains)
	(glyph_to_name): Similar.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Slightly refactor.

	* src/libs/libgroff/font.cpp (font::load): Use same loop style
	as `font::load_desc()`.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Fix off-by-one error in font and device description
	file reader diagnostics.

	* src/libs/libgroff/font.cpp (text_file::text_file): All text
	files begin with line 1, not line 0.

	Fixes <https://savannah.gnu.org/bugs/?61173>.

2021-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Boolify more interfaces.

	* src/include/font.h (font::unit_scale):
	* src/libs/libgroff/font.cpp (font::unit_scale): Demote return
	type from `int` to `bool`.  Use Boolean literals instead of
	integers.

	* src/libs/libgroff/font.cpp (struct text_file): Rename `next`
	member function to `next_line`.  Demote its return type from
	`int` to `bool`.  Use Boolean literals instead of integers.

2021-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Boolify local variables.

	* src/libs/libgroff/font.cpp (font::load, font::load_desc):
	Demote local variables used as Booleans from `int` to `bool` and
	update literals used with them from integer to Boolean.

2021-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grn, groff, troff]: Communicate better when device DESC file
	can't be loaded.

	* src/libs/libgroff/font.cpp (font::load_desc): Stop writing
	diagnostic to standard error.
	* src/preproc/grn/main.cpp (getres):
	* src/roff/troff/troff.cpp (main): Replace "sorry, I can't
	continue" fatal diagnostic with a more informative message.
	Instead say which device's DESC file the program was trying to
	open, which might reveal a user's logic error or typo.
	* src/roff/groff/groff.cpp (main): Replace "invalid device" text
	of fatal diagnostic similarly.  I think it is more helpful to
	indicate the operation that failed rather than saying the device
	was invalid, particularly since there are other ways for a
	device description to be invalid even if a DESC file is found
	and loaded.

2021-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Throw warning diagnostic if device DESC file attempts
	to load unavailable fonts.

	* src/roff/troff/input.cpp (main): Take advantage of new Boolean
	return values of `mount_style()` and `mount_font()` to produce
	warning diagnostics if mounting a style or font as directed by
	the DESC file fails.  Explain in a comment why, at present, this
	style mount warning will never actually trip.

2021-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Lift font mounting diagnostic messages to be closer to
	their user-controlled contexts to provide more information.  In
	many cases no diagnostic was being thrown at all when an
	unavailable font was requested by name, which is the method most
	users prefer, and which meant that failures resulting from typos
	in font names for many requests (`uf`, `fschar`, `rfschar`,
	`special`, `fspecial`, `fzoom`, `bd`, `tkf`, `cs`) were going
	unreported.  Further, promote these font warnings to errors
	because the request will utterly fail to do what was requested
	with no reasonable fallback.  Possibly, they were formerly
	warnings because at the low level they were being emitted, they
	could also have originated from unavailable fonts encountered in
	device description files, and while that's bad news, it results
	in no formatting problems if it doesn't affect fonts that an
	input document actually uses.

	* src/roff/troff/node.cpp (struct font_lookup_info): New struct
	keeps the font name or position requested, and the position of
	successful font lookup.
	(font_lookup_info::font_lookup_info): Add constructor.
	(font_lookup_error): New function builds error message using a
	`font_lookup_info` struct and a message argument.
	(get_fontno): Rename to...
	(has_font): ...this.  Add argument to take a pointer to a
	`font_lookup_info` struct.  Return a `bool` indicating whether
	the lookup succeeded.  Place former `int` return value into the
	struct instead.  Populate the other struct members with the
	requested font name or position, as appropriate.
	(mount_font_no_translate): Stop throwing warning diagnostic here
	if a font cannot be loaded.  Instead, throw them...
	(font_position): ...here, and...
	(underline_font, define_font_special_character,
	remove_font_special_character, read_special_fonts,
	font_special_request, font_zoom_request, bold_font, track_kern,
	constant_space): ...here, using `font_lookup_info` structs and
	`has_font()`.
	(remove_font_special_character): Stop returning early if font
	lookup fails; it's gratuitously inconsistent with other similar
	functions (save one, which has a reason to be different).
	(define_font_special_character): Return early if font lookup
	fails and say why in a comment (we can't `skip_line()`).

	Fixes <https://savannah.gnu.org/bugs/?59522>.

2021-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* [libgroff, troff]: Further boolify.

	* src/include/font.h (load_font, font): Demote parameters from
	{pointer to} `int` to `bool` and update default literal from
	integer to Boolean (except for the pointer).  Update comment.
	* src/libs/libgroff/font.cpp (load_font, load): Similarly.

	* src/roff/troff/node.h (mount_font):
	* src/roff/troff/node.cpp (mount_font): Demote return type from
	`int` to `bool`.

	* src/roff/troff/node.h (mount_style):
	* src/roff/troff/node.cpp (mount_style): Promote return type
	from `void` to `bool`.

	* src/roff/troff/node.cpp (mount_font_no_translate): Demote
	return type and `check_only` parameter from `int` to `bool` and
	use Boolean rather than integer literals with them.
	(check_font): Update call site of `mount_font_no_translate` to
	use Boolean literal.
	(font_position): Indicate that "error" is ignored by casting
	return value of `mount_font` to void instead of using a comment.
	(style): Cast return value of `mount_style` to `void`.

2021-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* Makefile.am: Add `.DELETE_ON_ERROR` special target; both GNU
	and FreeBSD make(1)s support it so maybe it will be portable
	enough.  This avoids, among other problems, a target appearing
	falsely up-to-date (often as an empty file) when the troff
	process generating it experiences an assertion failure.

2021-09-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	Since June 1991 if not earlier, groff (technically, the refer,
	lookbib, and lkbib programs) has trusted the header contents of
	binary bibliographic index files (canonically generated with
	indxbib(1)) regarding the sizes of the data structures that
	follow in the file, a notorious class of security problem.  In
	July 2013, the Mayhem Team at Carnegie Mellon University
	reported to the Debian Bug Tracking System a problem with
	groff's refer(1) implementation dumping core when reading an
	index file prepared by a fuzzer.

	* src/libs/libbib/index.cpp (index_search_item::check_header):
	Add new member function to validate the header of an indexed
	bibliography file, returning a string describing in detail the
	first validity problem encountered.
	(index_search_item::load): Perform the foregoing check before
	using any of the size values taken from the header; they are
	relied upon for pointer arithmetic.  If in verification mode
	{using the undocumented `-V` flag to refer(1), lkbib(1), or
	lookbib(1)}, report the details of the problem encountered.
	Regardless of that mode, if there is a validity problem, report
	corruption of the index file and abandon it, forcing fallback to
	the text version of the corresponding bibliography file.

	Fixes <https://bugs.debian.org/716109>.

2021-09-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libbib/index.cpp
	(index_search_item::get_invalidity_reason): Don't complain about
	a last list element being nonnegative if the list size was zero
	in the first place, as can happen with an empty index.  More
	seriously from a language standpoint, avoid reading through a
	negative array index (this can escape a compiler's attention
	because we're reading from the midst of a heap-allocated or
	`mmap()`ed region, but it's still a code smell).

	Fixes <https://savannah.gnu.org/bugs/?61144>.

2021-09-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libbib/index.cpp (index_search_item::load)
	(index_search_item::get_invalidity_reason)
	(index_search_item::add_out_of_date_file): Clarify diagnostic
	messages.  Make it more obvious when we're complaining of a
	problem in an indexed bibliographic database file (rather than a
	plain text one).  Dial down the amount of Unix jargon a little.

2021-09-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libbib]: Partially boolify.

	* src/include/search.h:
	* src/libs/libbib/index.cpp:
	* src/preproc/refer/refer.cpp:
	* src/utils/lkbib/lkbib.cpp:
	* src/utils/lookbib/lookbib.cpp: Demote `verify_flag` from an
	`int` to a `bool`, rename it to `do_verify`, use Boolean
	instead of integer literals with it, and update call sites.

	* src/libs/libbib/index.cpp: Rename `do_verify()` member
	function to `get_invalidity_reason()` (it returns a string).
	Demote `load()` from `int` to `bool`; do the same for `verify()`
	and rename it to `is_valid()` as well.  Use Boolean instead of
	integer literals with them.
	(index_search_item::is_valid, make_index_search_item): Update
	call sites of renamed member functions.

2021-09-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libbib/map.c (mapread): Compare return value of
	`mmap()` to `MAP_FAILED` instead of `(char *)-1`.  `MAP_FAILED`
	is documented in POSIX Issue 5 a.k.a. SUSv2
	<https://pubs.opengroup.org/onlinepubs/007908799/xsh/mmap.html>
	{1997} and should be portable enough by now.

2021-09-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Clamp negative tab stop positions to zero instead of
	throwing an assertion failure.

	* src/roff/troff/env.cpp (tab_stops::distance_to_next_tab):
	Replace `assert` with clamping logic, ensuring that `lastpos`
	can never be negative.  While negative tab stop positions don't
	make much sense (they result in zero horizontal motion), user
	input like `.ta T -5` should never provoke an assertion failure.

	(set_tabs): Throw range warning in additional scenario, viz., if
	a repeating tab offset is negative.

	Fixes <https://bugs.debian.org/990406>.  Thanks to наб for the
	report.

2021-09-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Boolify `set_tabs` function.

	* src/roff/troff/env.cpp (set_tabs): Demote local variables from
	`int` to `bool` and give them predicate-like names.
	  - `first` -> `is_first_stop`
	  - `repeated` -> `is_repeating_stop`
	Use Boolean instead of integer literals in assignments to them.

2021-09-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Deprecate `OP` macro.

	* tmac/an-ext.tmac (OP): Move implementation from here...
	* tmac/an.tmac (OP): ...to here.  Throw deprecation warning.
	Throw style warning if wrong number of arguments given.

	* tmac/groff_man.7.man.in (Description): Drop from introductory
	macro summary.
	(Description/Command synopsis macros): Move discussion from
	here...
	(Description/Deprecated features): ...to here.  Explain why it's
	deprecated.

2021-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Make `ab` request quiet if given no arguments.  The
	`tm`, `tm1`, and `tmc` requests provide ample flexibility for
	constructing diagnostic messages prior to an error exit, and
	it's convenient to make `ab` itself quiet instead of saying
	"User Abort." as Unix Version 7 troff did.  Further, there is no
	standardization across troffs regarding what `ab` should emit if
	arguments are absent.

	* src/roff/troff/input.cpp (abort_request): Do it.

	* src/roff/groff/tests/ab_works.sh:
	* src/roff/groff/groff.am (groff_TESTS): Test it.

	* doc/groff.texi (Debugging, Implementation Differences):
	* man/groff.7.man (Requests/Request short reference):
	* man/groff_diff.7.man (Implementation differences): Document
	it.

	Fixes <https://savannah.gnu.org/bugs/?61070>.  Thanks to Dave
	Kemper for the discussion.

2021-09-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Update exit status literals.

	* src/roff/troff/div.cpp (top_level_diversion::begin_page):
	* src/roff/troff/input.cpp (exit_troff, abort_request, do_error)
	(fatal_with_file_and_line): Use standard C library preprocessor
	symbols `EXIT_SUCCESS` and `EXIT_FAILURE` instead of 0 and 1
	literals, respectively.

2021-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Drop unused member function.

	* src/roff/troff/token.h (class token): Drop unused `title`
	member function.  Its implementation was apparently removed in
	the prehistory of our Git repository: see James Clark's
	ChangeLog entry of 1990-09-06.

2021-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Remove workaround for Cfront 1.2 bug.

	* src/roff/troff/input.cpp (do_define_macro): Move `dot_symbol`
	from to file to function local scope as originally intended.

2021-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Rename parameter.

	* src/roff/troff/input.cpp (token::usable_as_delimiter): Rename
	parameter from `err` to `report_error` to be more communicative.

2021-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Boolify members of `token` class.

	* src/roff/troff/token.h (class token): Demote return type of
	several member functions from `int` to `bool` and rename them.
	  - `backspace` -> `is_backspace`
	  - `delimiter` -> `usable_as_delimiter`
	  - `dummy` -> `is_dummy`
	  - `eof` -> `is_eof`
	  - `horizontal_space` -> `is_horizontal_space`
	  - `hyphen_indicator` -> `is_hyphen_indicator`
	  - `leader` -> `is_leader`
	  - `left_brace` -> `is_left_brace`
	  - `newline` -> `is_newline`
	  - `page_ejector` -> `is_page_ejector`
	  - `right_brace` -> `is_right_brace`
	  - `space` -> `is_space`
	  - `special` -> `is_special`
	  - `stretchable_space` -> `is_stretchable_space`
	  - `tab` -> `is_tab`
	  - `transparent_dummy` -> `is_transparent_dummy`
	  - `transparent` -> `is_transparent`
	  - `unstretchable_space` -> `is_unstretchable_space`
	  - `white_space` -> `is_white_space`
	  - `zero_width_break` -> `is_zero_width_break`
	(class token): Drop 1991 comment anticipating that member
	function `nspaces` could return "2" for a "double space"; this
	was apparently never implemented.
	(class token): Drop parameter names from declarations; the
	prevailing style (familiar from Stroustrup) is not to use them.
	(token::is_special): Simplify implementation.

	* src/roff/troff/input.cpp (has_arg)
	(token::usable_as_delimiter): Update definitions of above member
	functions not defined in token.h.

	* src/roff/troff/div.cpp (begin_page, space_request, need_space)
	(output_saved_vertical_space, flush_output):
	* src/roff/troff/env.cpp (fill, no_fill, center)
	(right_justify, indent, temporary_indent, margin_character)
	(number_lines, do_break_request, hyphen_word):
	* src/roff/troff/input.cpp (next_file, do_overstrike)
	(do_bracket, do_name_test, do_expr_test, do_zero_width)
	(token::skip, has_arg, skip_line, empty_name_warning)
	(non_empty_name_warning, do_get_long_name, process_input_stack)
	(flush_pending_lines, decode_args, read_request)
	(do_define_string, do_define_character, remove_character)
	(do_define_macro, length_request, get_delim_number)
	(get_line_arg, read_size, get_delim_name, do_register, do_width)
	(read_title_parts, encode_char, do_special, device_request)
	(output_request, skip_alternative, begin_alternative)
	(nop_request, do_if_request, do_source, pipe_source)
	(ps_bbox_request, tag, taga, do_terminal, do_translate)
	(hyphenation_code, hyphenation_patterns_file_code, define_class)
	(get_optional_char, check_missing_character, abort_request)
	(copy_file, transparent_file, do_macro_source)
	(charinfo_to_node_list, read_draw_node, read_color_draw_node):
	* src/roff/troff/node.cpp (get_fontno)
	(remove_font_special_character, bold_font):
	* src/roff/troff/number.cpp (start_number, parse_term):
	* src/roff/troff/reg.cpp (define_number_reg, alter_format):
	Update call sites to use new names.

	* src/roff/troff/input.cpp (token::usable_as_delimiter)
	(read_draw_node): Return Boolean, not integer, literals.

2021-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Clamp line and title lengths to device horizontal
	resolution.

	* src/roff/troff/env.cpp (line_length, title_length): Do it.

	Fixes <https://savannah.gnu.org/bugs/?61116>.

2021-09-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (do_hyphenation_patterns_file):
	Refactor slightly.  Demote `append` from `int` to `bool`.
	(hyphenation_patterns_file, hyphenation_patterns_file_append):
	Update call sites to use Boolean, not integer, literals.

2021-09-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/hvunits.h:
	* src/roff/groff/number.cpp: Mark `H0`, `V0` objects as `const`.

2021-09-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (do_underline_special): Refactor
	slightly.
	  - Rename `underline_spaces` -> `do_underline_spaces`.
	  - Demote it from an `int` to a `bool`.
	  - Use ternary operator and explicit character literals when
	    writing device control command instead of doing arithmetic
	    on a character literal.
	  - Update call sites to use Boolean literals.
	  - Relocate function to avoid forward reference.
	  - Mark function as static to eliminate external linkage.
	    Remove now-unnecessary prototype.

2021-09-04  Keith Marshall  <keith.d.marshall@ntlworld.com>

	Add "ms" footnote marker placement hook.

	* tmac/s.tmac (FS-MARK): New macro; define as no-op, by default.
	(@FS): Invoke FS-MARK as first action, allowing caller to "hook" it.

2021-09-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (distribute_space): Refactor slightly.
	  - Rename `force_reverse` to `force_reverse_node_list`.
	  - Rename `reverse` to `do_reverse`.
	  - Demote both of the above from `int` to `bool`.
	  - Use Boolean literals with them.
	  - Add assertions to enforce positive values of `nspaces` and
	    `desired_space`.
	  - Remove now-redundant test for `nspaces` being positive.
	  - Add explanatory comments.
	(environment::wrap_up_field): Update call sites of
	`distribute_space` when non-default value of
	`force_reverse_node_list` is supplied.

2021-09-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Don't adjust nonadjustable lines.  This means that the
	direction from which an output line in adjustment mode "b" (or
	its "n" synonym) is filled with supplemental space is not
	changed if that output line does not require adjustment.  This
	will result in whitespace changes to documents using that
	adjustment mode, and these changes will be plainly visible on
	low-resolution output devices like terminals.

	To illustrate, in the following "A" means an output line
	requiring adjustment; "F" a line that is "full" and does not;
	and "L" and "R" indicate distribution of adjustment spaces from
	the left and right, respectively.

	groff 1.22.4    groff 1.23.0
	------------    ------------
	A    L          A    L
	A    R          A    R
	F    L          F    R
	A    R          A    L

	* src/roff/troff/env.cpp (distribute_space): Return early if
	either the amount of desired space to be distributed or the
	count of space nodes in the output line to distribute it among
	is zero.

	* tmac/tests/an_TH-repairs-ad-damage.sh: Update test to expect
	space to be distributed differently.

	Fixes <https://savannah.gnu.org/bugs/?61089> and
	<https://savannah.gnu.org/bugs/?60673>.

2021-09-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	Skip core-dump-checking test if a core file already exists.

	* src/roff/groff/tests/regression_savannah_59202.sh: Skip test
	if a core dump is already present.

2021-09-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #60189.

	* src/roff/groff/tests/break_zero-length_output_line_sanely.sh:
	Do it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2021-08-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Tweak diagnostic message.

	* src/roff/troff/env.cpp (environment::environment): Use
	terminology more rigorously in diagnostic.

2021-08-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Fix code style nit.

	* src/libs/libgroff/errarg.cpp (errprint): Replace `assert(0)`
	with a meaningful predicate.

2021-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Demote `need_space` to Boolean.

	* src/libs/libgroff/error.cpp (do_error_with_file_and_line):
	Demote local integer `need_space` and its assignments to `bool`.

2021-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Boolify `font::load()` and `font::load_desc()`
	return values.

	* src/include/font.h (font::load, font::load_desc):
	* src/libs/libgroff/font.cpp (font::load, font::load_desc): Do
	it.

2021-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (TRADITIONAL_CPP): Update `AC_MSG_CHECKING`
	argument to refer to "pre-ISO C90 syntax" instead of a
	"traditional" preprocessor.  Call `AC_MSG_ERROR` (aborting
	configuration) if the check (for pre-C90 transformation)
	succeeds.  We thus withdraw support for such superannuated
	{"Reiser"} C preprocessors.

2021-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Un-indirect token concatenation through macro.

	* src/include/itable.h:
	* src/include/ptable.h: Do it.

2021-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop support for `TRADITIONAL_CPP`.  This means a C
	preprocessor that does not support the ANSI C89/ISO C90
	token concatenation operator "##".

	* src/include/itable.h:
	* src/include/ptable.h: Do it.

	* Makefile.am: Undocument preprocessor symbol.

2021-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop `a_delete` preprocessor wrapper for the
	`delete` operator.  It has been rendered unnecessary by the
	removal of support for ancient C++ compilers.

	* src/include/lib.h (a_delete): Drop symbol definition.

	* src/devices/grohtml/output.cpp (word::~word):
	* src/devices/grohtml/post-html.cpp (char_block::char_block)
	(assert_state::~assert_state, assert_state::add)
	(assert_state::close, replace_negate_str):
	* src/devices/grops/ps.cpp (ps_font::ps_font)
	(subencoding::subencoding, ps_printer::define_encoding)
	(ps_printer::encode_fonts):
	* src/devices/grops/psrm.cpp (resource_manager::document_setup)
	(resource_manager::supply_resource):
	* src/devices/grotty/tty.cpp (tty_printer::tty_color)
	(tty_printer::tty_printer, tty_printer::color_to_idx)
	(tty_printer::add_char):
	* src/include/itable.h (ITABLE(T)::~ITABLE(T))
	(ITABLE(T)::define):
	* src/include/ptable.h (PTABLE(T)::~PTABLE(T))
	(PTABLE(T)::define):
	* src/libs/libbib/index.cpp
	(index_search_item::~index_search_item, make_index_search_item,
	index_search_item_iterator::index_search_item_iterator,
	index_search_item::get_tag, index_search_item::munge_filename,
	index_search_item::search):
	* src/libs/libbib/linear.cpp (bmpattern::~bmpattern)
	(file_buffer::file_buffer, file_buffer::load)
	(linear_searcher::linear_searcher)
	(linear_searcher::~linear_searcher):
	* src/libs/libbib/search.cpp
	(search_list_iterator::search_list_iterator)
	(search_item::search_item):
	* src/libs/libdriver/input.cpp (IntArray::~IntArray)
	(IntArray::append, StringBuf::~StringBuf, StringBuf::append)
	(get_integer_arg, parse_x_command, do_file):
	* src/libs/libdriver/printer.cpp (printer::printer)
	(printer::load_font, text_file::~text_file, text_file::next)
	(font::~font, font_widths_cache::~font_widths_cache)
	(font:alloc_ch_index, font::extend_ch, font::compact)
	(font::load_desc):
	* src/libs/libgroff/fontfile.cpp (font::open_file):
	* src/libs/libgroff/relocate.cpp (searchpath, searchpathext)
	(set_current_prefix):
	* src/libs/libgroff/searchpath.cpp (search_path::search_path)
	(search_path::command_line_dir, search_path::open_file)
	(search_path::open_file_cautious):
	* src/libs/libgroff/string.cpp (sfree, srealloc)
	(string::remove_spaces):
	* src/libs/libgroff/symbol.cpp (symbol::symbol, concat):
	* src/libs/libgroff/tmpfile.cpp (temp_init::temp_init)
	(xtmpfile_list_init::~xtmpfile_list_init, xtmpfile):
	* src/preproc/eqn/box.cpp (set_gfont, set_grfont, set_gbfont)
	(box_list::append, box_list::~box_list):
	* src/preproc/eqn/delim.cpp (make_delim_box)
	(delim_box::~delim_box):
	* src/preproc/eqn/eqn.ypp (number):
	* src/preproc/eqn/lex.ypp (file_input::~file_input)
	(argument_macro_input::~argument_macro_input):
	* src/preproc/eqn/pile.ypp (matrix_box::~matrix_box)
	(matrix_box::append):
	* src/preproc/eqn/special.cpp (special_box::~special_box):
	* src/preproc/eqn/text.ypp (set_char_type):
	* src/preproc/html/pre-html.cpp (get_line, scanArguments):
	* src/preproc/pic/object.cpp (output::~output)
	(output::set_args, text_item::~text_item)
	(object_spec::~object_spec, command_object::~command_object)
	(line_object::~line_object):
	* src/preproc/pic/pic.ypp (placeless_element, reset_variables)
	(print_args, text_expr, object_spec, text, sprintf_args, path):
	* src/preproc/refer/command.cpp (input_item::~input_item)
	(input_item::peek_char):
	* src/preproc/refer/label.ypp (lookup_label):
	* src/preproc/refer/refer.cpp (store_citation, store_reference):
	* src/preproc/tbl/main.cpp (format::add_rows, format::~format):
	* src/preproc/tbl/table.cpp (block_entry::~block_entry)
	(table::~table, table::allocate):
	* src/roff/groff/groff.cpp (possible_command::~possible_command)
	(possible_command::clear_name):
	* src/roff/troff/column.cpp
	((justification_spec::~justification_spec)
	(justification_spec::append):
	* src/roff/troff/dictionary.cpp (dictionary::lookup):
	* src/roff/troff/env.cpp (override_sizes, tab_stops::to_string)
	(hyphen_word, hyphen_trie::insert_hyphenation):
	* src/roff/troff/input.cpp (read_long_escape_name, token::next)
	(do_get_long_name, temp_iterator::~temp_iterator)
	(get_delim_name, pipe_source, read_string, pipe_output)
	(system_request, open_mac_file, do_macro_source)
	(do_register_assignment, do_string_assignment, read_draw_node)
	(copy_mode_error):
	* src/roff/troff/node.cpp (troff_output_file::set_font)
	(troff_output_file::~troff_output_file, draw_node::is_tag)
	(grow_font_table, font_family::~font_family)
	(font_family::make_definite):
	* src/utils/hpftodit/hpftodit.cpp (name_list::~name_list)
	(read_map):
	* src/utils/indxbib/indxbib.cpp (main, get_cwd):
	* src/utils/tfmtodit/tfmtodit.cpp (tfm::~tfm, tfm::load): Port
	uses of `a_delete` to `delete[]`.

2021-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop `ad_delete` preprocessor wrapper for the
	`delete` operator.  It has been rendered unnecessary by the
	removal of support for ancient C++ compilers.

	* src/include/lib.h (ad_delete): Drop symbol definition.

	* src/preproc/pic/object.cpp (graphic_object::print_text):
	* src/preproc/refer/ref.cpp (reference::reference)
	(reference::merge, reference::insert_field)
	(reference::delete_field):
	* src/preproc/tbl/main.cpp (format::add_rows): Port uses of
	`ad_delete` to `delete[]`.

2021-08-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_ARRAY_DELETE): Update `AC_MSG_CHECKING`
	argument to refer to "ISO C++98" instead of "ANSI".  Call
	`AC_MSG_ERROR` (aborting configuration) if the check fails.

2021-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop support for `ARRAY_DELETE_NEEDS_SIZE`.

	* src/include/lib.h [ARRAY_DELETE_NEEDS_SIZE]: Drop preprocessor
	conditional branch.  This abandons support for certain pre-ISO
	C++98 compilers.  (According to a now-removed comment, unsized
	array deletion was documented in "ARM", meaning _The C++
	Annotated Reference Manual_, published in 1989.)

	* Makefile.am: Undocument preprocessor symbol.

2021-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop redefinition of `INT_MIN`.

	* src/include/lib.h: Drop redefinition of `INT_MIN`.  It was
	motivated by a bug in the AT&T C++ compiler (cfront), version
	2.0, released in June 1989.  Implementations have had 30 years
	to get this right; assume that they have.

	* PROBLEMS: Drop corresponding item.

2021-08-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Drop long-dead `COOKIE_BUG` logic.

	* src/libs/libgroff/new.cpp (operator new, operator delete):
	Drop preprocessor conditional branches on the `COOKIE_BUG`
	symbol.  This was de-documented, and an autoconf check for its
	necessity removed, way back in groff 1.10 (November 1995).  It
	was relevant only to GCC from versions 2.0 to 2.2.2 (all 1992).

2021-08-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Refactor `font::scan_papersize()`.

	* src/libs/libgroff/font.cpp (font::scan_papersize): Ensure
	successful return value of `fgets()` before attempting to parse
	string for paper format.  Convert `test_file` to Boolean and
	rename to `attempt_file_open`.  Quiets GCC `-Wunused-result`
	warning.

2021-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Apply naming convention.

	* tmac/tests/e_footnotes_work_with_columns.sh: Rename from...
	* tmac/tests/e_footnotes-work-with-columns.sh: ...to this.
	* tmac/tmac.am (tmac_TESTS): Update.

2021-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an.tmac (IP): Make code more accessible by using a
	Boolean operator rather than an arithmetic one (assembly
	language programmers are comfortable with the interchangeability
	of subtraction and comparison, but not everyone is).

2021-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	groff(7): Document more escapes.

	* man/groff.7.man (Escape short reference): Document
	`\[charNNN]`, `\[uNNNN]`, `\[uNNNN_NNNN...]` escape sequences.
	Revise descriptions of `\O0` and `\O1` escape sequences.
	Document `\O2`, `\O3`, `\O4`, and `\O5` escape sequences.

2021-08-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	groff(7): Fix bug in `\?` escape rendering.

	* man/groff.7.man (ESC?): Fix bug in page-private macro: the
	question mark that ends this uniquely-syntaxed escape sequence
	was not shown with the mandatory escape character before it.
	Problem dates back at least to commit 41b0e794, 19 February
	2007, but possiby to f790bc7a9, 6 January 2002.

2021-08-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[docs]: Elaborate macro definition discussion.

	Fixes <https://savannah.gnu.org/bugs/?57944>.  Thanks to Dave
	Kemper for the report.

2021-08-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tests]: Make robust against $GROFF_TYPESETTER settings.

	* src/roff/groff/tests/\
	use_point_size_escape_with_single_digit_arg.sh:
	* src/roff/nroff/tests/verbose_option_works.sh:
	* tmac/tests/s_IP-indents-using-paragraph-type-size.sh: Export
	an empty $GROFF_TYPESETTER to the environment.

	Fixes <https://savannah.gnu.org/bugs/?60140>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-08-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Treat an empty $GROFF_TYPESETTER as unset.

	* src/libs/libgroff/device.cpp (device_init::device_init): Test
	both returned pointer from `getenv()` and, if that's not null,
	the first character of the string for nullity before assigning
	it to `device`.

	Fixes <https://savannah.gnu.org/bugs/?61068>.

2021-08-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff]: Rename font class member variable.

	* src/include/font.h (font class): Rename `unscaled_charwidths`
	member variable to `use_unscaled_charwidths`: since it is a
	Boolean, make it read more like a logical predicate.

	* src/libs/libgroff/font.cpp (font::get_width, font::load_desc):
	* src/libs/libgroff/fontfile.cpp (font class): Update
	initialization and assignments.

2021-08-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (get_copy): Demote integer arguments
	to Booleans and use Boolean literals for default values.  Rename
	`defining` to `is_defining`.
	(get_char_for_escape_name, do_define_macro): Update call sites
	that use non-default arguments to use Boolean literals and
	comments to document what's being requested.

2021-08-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (DOC_GROFF_ONLY): Stop running groff in unsafe
	mode; no documents (in _this_ directory) appear to require it.

2021-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grn]: Fix code style issues.

	* src/preproc/grn/hgraph.cpp:
	* src/preproc/grn/hpoint.cpp:
	* src/preproc/grn/main.cpp:
	* src/preproc/grn/hdb.cpp: Drop use of `register` storage class.

	Fixes <https://savannah.gnu.org/bugs/?57733>.  Thanks to Bjarni
	Ingi Gislason for the report and a suggested patch.

	* src/preproc/grn/hgraph.cpp (len, HGPrintElt, picurve):
	* src/preproc/grn/hdb.cpp (DBRead): Wrap long lines.

	* src/preproc/grn/hgraph.cpp: Rename function from
	`Paramaterize` to `Parameterize`.
	(HGCurve): Update call site.

	* src/preproc/grn/main.cpp (add_file): Drop redundant cast in
	`realloc()` call.
	(conv, interpret): Use standard English in diagnostic messages.

2021-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/hdb.cpp: Perform more input validation.
	Improve diagnostics by taking advantage of libgroff
	infrastructure and tracking the line number of the input file.
	Add global `lineno`.
	(DBRead): Increment `lineno` after reading newlines from input.
	Call `error_with_file_and_line()` instead of `error()`.  If
	input reports a negative length for the text (string) to follow
	in the file, exit with a fatal diagnostic.  Check for EOF while
	reading text string.
	(DBGetType): Convert `fprintf()` call for warning diagnostic to
	`warning_with_file_and_line()`.
	(DBRead, DBGetType): Add contextual information to diagnostic
	messages.

	Fixes <https://savannah.gnu.org/bugs/?61043>.  Thanks to
	Savannah user eqkws for the report.

2021-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/main.cpp (usage): Update usage message.

2021-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grn]: Add and use `malloc()` wrapper.

	* /src/preproc/grn/main.cpp (grnmalloc): New function takes
	argument of `size_t` type and constant string argument to
	describe what is being allocated.  Return non-null pointer from
	`malloc()`, otherwise call `fatal()`, describing what was being
	allocated and the problem reported by the system.

	* src/preproc/grn/hdb.cpp (DBCreateElt):
	* src/preproc/grn/hpoint.cpp (PTMakePoint):
	* /src/preproc/grn/main.cpp (main, interpret): Migrate
	`malloc()` callers to `grnmalloc()`.

2021-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/hdb.cpp (DBRead): Check return value of
	`sscanf()` and call `fatal()` if no conversions succeeded.  The
	blithe discard of a useful return value is bad enough, but this
	one took place inside a do-while such that it could loop
	forever trying fruitlessly to parse two doubles out of strings
	that didn't contain them (the loop never checked the EOF status
	of the file stream from which it was reading, and relied on
	`fgets()` to keep advancing the stream pointer).  Discovered
	while root-causing Savannah #61043.

2021-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	Resolve compiler warnings relating to format string security and
	ISO C++98 conformance.

	* src/preproc/eqn/delim.cpp (define_extensible_string):
	* src/preproc/pic/pic.ypp (do_sprintf): Use #pragma to silence
	GCC "format-nonliteral" warning and explain why our usage is
	safe in a comment.

	* src/preproc/preconv/preconv.cpp (detect_file_encoding): Use
	`l` modifier to `%u` `fprintf()` conversion instead of `z`, and
	cast return values of `size_t` to unsigned long; "ISO C++98
	does not support the ‘z’ gnu_printf length modifier" (it doesn't
	support `ll` either).  N.B. this is debugging output only.

	* src/roff/groff/groff.cpp (synopsis):
	* src/roff/troff/input.cpp (usage): Repeat variadic argument for
	`%s` conversion in `fprintf()` call because "ISO C++98 does not
	support %n$ operand number formats".

	* src/roff/troff/env.cpp: Initialize adjustment and hyphenation
	mode enums without commas at the end of the enumeration lists.

2021-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Clean up the interface between `an-footer` and `BT`, and
	HTML header and footer suppression generally.  Move
	responsibility for checking the `ps4html` register from the
	latter to the former.  This is not something a `BT` redefiner
	{see groff_man(7)} should have to worry about.

	* tmac/an.tmac (BT): Drop test of `ps4html` register and early
	return.
	(an-header, an-footer): Return immediately if
	`an-suppress-header-and-footer` is true.  Remove conditional on
	`an-is-output-html`.
	(initialization): Define `an-suppress-header-and-footer`
	register; true if `an-is-output-html` is true, or if `ps4html`
	is defined.

2021-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (get_resolution): Unbrace a
	single-statement `while` loop per prevailing coding style.  Add
	comments noting how we aren't parsing DESC files _precisely_ as
	our documentation specifies.

2021-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	Convert font class `int` members to `bool` where appropriate.

	* src/include/font.h (font class): Demote integers to Booleans
	and use Boolean literals where possible.  Rename some member
	variables to look like logical predicates.
	  - contains()
	  - is_special()
	  - has_ligature()
	  - tcommand -> has_tcommand
	  - unscaled_charwidths
	  - pass_filenames
	  - use_charnames_in_special
	  - is_unicode
	  - special (private)
	* src/libs/libgroff/font.cpp (font::font): Construct object
	using Boolean literal.
	(font::contains):
	(font::is_special):
	(font::has_ligature): Convert return type to `bool`.
	(font::load):
	(font::load_desc): Assign to member variables using Boolean
	literals.
	* src/libs/libgroff/fontfile.cpp: Initialize appropriate globals
	using `bool` type and Boolean literals.
	* src/roff/troff/troff.h:
	* src/roff/troff/input.cpp (main):
	* src/roff/troff/node.cpp (troff_output_file::put_char_width):
	Rename `tcommand_flag` to `device_has_tcommand` to suggest a
	logical predicate, and to emphasize the formatter's concern with
	what the output device can accept in the intermediate output
	language.
	* src/roff/troff/input.cpp: Initialize `device_has_tcommand`
	global using `bool` type and Boolean literal.

2021-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Clarify breadth of application of `ll` macro.

	* doc/meref.me: Document application of .ll macro only to the 3
	environments that me(7) uses, not any the user might create.
	* tmac/e.tmac (@C, xl, ll): Update comments.

	Fixes <https://savannah.gnu.org/bugs/?55060>.

2021-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #58736.

	* tmac/tests/e_footnotes_work_with_columns.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (bc): Fix problem with multiple columns on long
	pages.  Space to the next page location trap, not 24 inches.
	Thanks to Dave Kemper and Bjarni Ingi Gislason for help tracking
	this bug down.

	Fixes <https://savannah.gnu.org/bugs/?55081>.

2021-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #55081.

	* tmac/tests/e_columns-work-on-long-pages.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-08-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Localization): Add section.

2021-08-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/cs.tmac:
	* tmac/de.tmac:
	* tmac/fr.tmac:
	* tmac/it.tmac:
	* tmac/sv.tmac: Update ms package localization to use an
	appropriate hyphenation mode for the `HY` register (the
	mode for the pattern files, plus 2 as is traditional in ms).

2021-08-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac (1c): Place comment escape sequence immediately
	after macro argument.  (When redefining a request, one needs to
	remember that request arguments are not parsed exactly as macro
	arguments are.)  Quiets "-w tab" warning.

2021-08-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Fix misleading documentation claim; gremlin(1) pictures
	cannot be included directly; they must be preprocessed with
	grn(1).

	* doc/meref.me:
	* tmac/groff_me.7.man: Replace "gremlin" with "grn".

2021-08-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_me.7.man: Document `n1` and `n2` macros.

2021-08-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[me]: Fix PS/n1 combination diagnostic spew and apparent logic
	error.

	* tmac/e.tmac (@h): Place comment escape sequence immediately
	after macro argument.  (When redefining a request, one needs to
	remember that request arguments are not parsed exactly as macro
	arguments are.)
	(n2): Prefix with `do` requests using long register names.
	(n2): Add macro-local register `|l` to store length of first
	argument.  Don't attempt to extract a substring beyond the
	bounds of its source, which produces a warning diagnostic.
	(&&): Define no-op macro for use as end macro in nested macro
	definition.
	(PS): Fix unbalanced-else diagnostic by changing `if` to `ie`.
	(PS): Initialize `PS_nm_cnt` register to 0 instead of relying on
	implicit definition.
	(PS): Prefix with `do` definition of long macro name.
	(PS): Indent call of end macro.
	(PS): Add comment after escaped space.
	(PS, PF): Prefix with `do` call of long macro name.

	Fixes <https://savannah.gnu.org/bugs/?61019>.

2021-08-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (do_line): Recognize `n1` and `n2` as
	characteristic me(7) macros.

2021-08-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_me.7.man: Document GF, IE, IF, IS, and PF macros.

2021-08-08  Dave Kemper <saint.snit@gmail.com>

	* tmac/e.tmac: Rename `PE` to `PF` but remove vertical spacing.
	(PE): New `PE` calls `PF` and then spaces as old `PE` did.

	Fixes <https://savannah.gnu.org/bugs/?60479>.

2021-08-06  Dave Kemper <saint.snit@gmail.com>

	* doc/meref.me: Improve documentation of image-inclusion macros.

	Fixes <https://savannah.gnu.org/bugs/?60478>.

2021-08-06  Dave Kemper <saint.snit@gmail.com>

	GNU pic recognizes two possible endings of a pic block: .PE or
	.PF.  This fact was documented in doc/pic.ms but not in the pic
	man page.  The minimal pic implementation provided by pic.tmac
	also did not include a .PF definition.

	* src/preproc/pic/main.cpp (main): Add dummy definition of `PF`
	macro.
	* tmac/pic.tmac (PF): Add macro that performs indentation only.
	(PE): Call PF for indentation.

	* doc/pic.ms (Interface to [gt]roff/How Scaling is Handled):
	* src/preproc/pic/pic.1.man (Description, Options): Mention `PF`
	in addition to `PS` and `PE`.

	Fixes <https://savannah.gnu.org/bugs/?60504>.

2021-08-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/refer-ms.tmac:
	* tmac/s.tmac (fn@init, @PP): Rename strings
	`fn@sup-{start,end}` to `fn@mark-{start,end}`.  This makes it
	more clear that the strings are brackets for the footnote
	marker, and not so much to do with the note text.  Further, in
	nroff mode, they aren't superscripts at all, but bracket glyphs.

2021-08-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.1.man (Examples): Add section.

	Addresses part of <https://savannah.gnu.org/bugs/?57667>.

2021-08-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/refer-ms.tmac: Use `fn@sup-{start,end}` instead of
	`par@sup-{start,end}` when setting refer(1) citation labels.
	This improves the appearance of the default labels on nroff
	devices.  Continues commit caeede07, 1 May.

2021-08-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tman/an-ext.tmac (EX, EE): Stop manipulating hyphenation.
	It's redundant since disabling fill mode already prevents
	automatic breaking, and therefore automatic hyphenation.
	* tmac/groff_man.7.man.in (Description/Document structure
	macros) <EX, EE>: Update documentation.

2021-08-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Update authorship credits.  I appear
	to have removed or refactored all of the "device" (recte: macro
	package) inference logic adapted from Ralph Corderoy's grog.sh;
	see commit 3617f42048f54cc3f0adc282ee3b9e481c75ebd5, 13 June
	2014.

2021-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Refactor through relocation and
	renaming.  Move several global objects into subroutines.
	  - `@request` -> `&do_line`
	  - `@macro_ms`, `@macro_man`, `@macro_man_or_ms` ->
	    `&infer_man_or_ms_package`
	  - `@main_package` -> `&construct_command`
	Rename some objects for clarity.
	  - `%Groff` -> `%score`
	  - `@filespec` -> `$input_file`
	Delete unused object.
	  - `@standard_macro`
	Add comments.

2021-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (do_line): When matching macro/request
	names, accept any non-whitespace character (Perl: \S) instead of
	just a word-constituent character (Perl: \w), since roff
	identifiers can contain unusual characters (refer(1) and
	groff_me(7) illustrate some real-world cases).

2021-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Refactor macro package inference.
	  - Stop manually populating `Groff` hash.  (It's itching for a
	    rename.)
	  - Stop calling now-dead subroutine `infer_macro_packages`.
	(do_line): Always store the names of all macros called to the
	`Groff` hash, incrementing it.  Now it's a proper scoreboard.
	Populate `inferred_main_package` from here upon encountering
	characteristic (i.e., uniquely named) macros of each package.
	Bug fix: drop "SP" from list of characteristic mom(7) macros;
	it's shared with mm(7).
	(infer_man_or_ms_package): Update comment.  Return 0 (false) if
	document appears to be "raw", using no full-service macro
	package.
	(infer_macro_packages): Delete; do_line() does this work.

2021-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Refactor preprocessor inference.
	  - Add new list, `inferred_preprocessor`.
	  - Drop preprocessor-related keys from `Groff` hash.
	  - Drop scalar `inside_tbl_table`.
	(do_line): Set up hash `preprocessor_for_macro`.  Detect
	preprocessor macros the way the preprocessors do, explained in a
	comment.  Respect AT&T compatibility mode when doing so.  Build
	list of inferred preprocessors.  This replaces the extensive and
	gaseous series of `if` statements that manipulated the `Groff`
	hash.
	(infer_preprocessors): Completely replace.  Set up a hash
	`option_for_preprocessor` mapping preprocessor names to groff
	options (where applicable).  Append to `command` and
	`preprocessor` lists as appropriate.  Sort the preprocessor
	options so they don't move around in the argument list depending
	on the order of their macros' appearance in the input.

	* src/utils/grog/tests/smoke-test.sh: Update test cases to
	expect preprocessor options to show up in sorted order.

2021-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Drop dead code.  Delete global
	hash `preprocs_tmacs`, unused since commit b0de53c9, 30 June.

2021-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix code nit.

	* src/preproc/html/pre-html.cpp (get_image_generator):
	Type-qualify `keyword_len` as `const` to encourage the compiler
	to compute this value (the length of a string literal) at build
	time.

2021-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Slightly refactor.

	* src/roff/troff/node.cpp: Add static `image_filename_len` to
	store length of cached image file name, so we don't wastefully
	recompute its length every time one is re-used.
	(suppress_node::tprint): Compute image file name length only
	when saving a new image file name.  Use saved length in later
	expressions.
	(min): Drop unused inline function.

2021-07-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Fix regression (breaking important pdfmark/pdfroff
	features) caused by my commit
	e876d4bfd193abb9a7d1fb6e76519349bded482a, 27 July.  An empty
	image file name is in fact semantically valid when writing a
	bounding box; pdfmark uses such boxes to frame hyperlinks.
	Avoid null pointer dereference by initializing `image_filename`
	to an empty string literal.  Thanks to Tadziu Hoffman and Keith
	Marshall for their patient explanations.

2021-07-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Refactor some internal functions.

	* src/roff/troff/node.cpp: Rename two functions that have only
	one caller.
	  - get_reg_int -> get_register
	  - get_reg_str -> get_string
	We now have:
	(get_register, get_string): Use `assert()` aggressively because
	these are deeply internal and validation is imperative.  Get rid
	of diagnostic messages (one of which perpetuated the dubious
	"number register" nomenclature) accordingly.
	(fetch_register): Also rename `prev_value`, misleadingly
	specific and seemingly copy-and-pasted out of a context where an
	auto-increment or -decrement might have been applied.  It's just
	the `value`.
	(suppress_node::tprint): Update call site.

2021-07-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Refactor `get_value` member functions.  Given their
	names and popular "getter/setter" paradigms from many OO
	languages, the return type is misleading.  Change it from `int`
	to `bool` since it returns only a success/failure status and
	modifies an argument (passed by reference) to deliver the
	requested data.

	* src/roff/troff/reg.h (reg, variable_reg):
	* src/roff/troff/div.cpp (page_offset_reg, page_length_reg)
	(vertical_position_reg, high_water_mark_reg)
	(distance_to_next_trap_reg, page_number_reg, no_space_mode_reg):
	* src/roff/troff/env.cpp (int_env_reg, vunits_env_reg)
	(hunits_env_reg, horizontal_place_reg):
	* src/roff/troff/input.cpp (writable_lineno_reg):
	* src/roff/troff/reg.cpp (reg, number_reg, variable_reg): Update
	class and member function definitions to reflect the new type.
	Update member function definitions to return appropriate Boolean
	literals instead of 0 and 1.

2021-07-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix Savannah #60981.  Refactor device description
	file handling and make it more robust.  Make pre-grohtml's
	-F option work as documented and honor device description file
	semantics documented in groff_font(5).

	* src/preproc/html/pre-html.cpp: Store partial filespecs of HTML
	and PostScript device files in constant strings.
	(get_resolution): Initialize `res` to zero.  Only `free()` the
	pointer `pathp` if `open_file()` succeeded (populating it).
	Stop checking for valid `sscanf()` conversions of an integer to
	store in `res`, and don't return early.  Instead process the
	whole DESC file; per our Texinfo manual and groff_font(5),
	"Later entries in the file ... override previous values."
	(get_image_generator): Add new function, paralleling
	`get_resolution()`, replacing open-coded logic in `main()`.
	Only the body of the `while` loop significantly differs.
	Instead of using `sscanf`, process the input character by
	character matching the keyword and {1,} spaces or tabs
	after it.  Whatever follows in `linebuf` must be the program
	name.
	(imageList::createPage): Add `assert()` to cause failure if an
	empty image generator program gets this far, because it creates
	repeated messes if it does.  (Something isn't checking exit
	statuses.)
	(main): Condense `image_gen` collection to a function call, a
	null pointer check, and a fatal diagnostic.  Add a sanity check
	and a fatal diagnostic if the PostScript resolution is garbage.
	{It's initialized to -1 and `get_resolution()` will return 0 if
	it doesn't find one.}

	Fixes <https://savannah.gnu.org/bugs/?60981>.

2021-07-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Delete or rename `debug` symbols to avoid clash with
	new `debug` function in libgroff.

	* src/preproc/html/pre-html.cpp: Update a comment to refer to
	"debugging" mode.  Rename static global from `debug` to
	`debugging`.
	(html_system, imageList::createPage, imageList::createImage,
	print_args, char_buffer::do_html, char_buffer::do_image,
	scanArguments): Update uses of static global.

	* src/preproc/html/pushback.cpp:
	* src/preproc/html/pushback.h: Delete unused `debug` member
	variable.

2021-07-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh: Fix straggling use of `$1`, which
	might not have a clear meaning in some shells after being
	shifted (what if we just shifted the last argument?).  Also
	`continue` after processing a (groff) option argument, as we
	should make no attempt to parse it.

2021-07-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_suppress): Recast diagnostic
	messages for clarity, to communicate in terms of what the
	escape sequence _is_, and to quote literals expected as input.
	* src/roff/troff/node.cpp (suppress_node::tprint): Recast
	diagnostic to prevent misinterpretation of image "description"
	as being HTML IMG tag alt text or something like that.
	Unfortunately, the new language speaks in terms of internal
	implementation details ("grohtml-info"), but at least that way
	it's easier for a user to decide if they care about it.

2021-07-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Avoid using sprintf() with user-controlled format
	string.

	* src/preproc/html/pre-html.cpp (makeFileName): Add comment
	noting need for implementation synchrony between this function,
	which generates \O5 escape sequences, and troff's
	suppress_node::tprint member function, which interprets them.
	* src/roff/troff/node.cpp: Rename 2 static globals for clarity.
	  - `last_image_filename` -> `image_filename`
	  - `last_image_id` -> `subimage_counter`
	(suppress_node::tprint): Set up the buffer for image file name
	to be written using a constant rather than an embedded literal.
	Unconditionally initialize the buffer with a string terminator,
	so there is no chance of a read from uninitialized storage.
	Drop unused code involving `tem`.  Drop stale comments.  Clarify
	comment: an `image_filename` doesn't _always_ contain a format
	string, only sometimes.  Replace use of `sprintf` with manual
	construction of a new image filename string.  There are two
	cases, one where a format string {presently "%d"} is present,
	and one where it is not.  If it is present, locate it
	{`percent`}.  This means a limited/bounded image ("subimage") is
	being processed; increment the subimage counter.  Write a new
	image file name preserving the parts before and after "%d" (the
	"prefix" and "suffix", and replacing only the middle, using
	`sprintf` with the subimage counter and the (string literal)
	format.  Be mindful of string bounds and memory allocation,
	issuing diagnostics or aborting as necessary.  If the image file
	name does _not_ contain a format string, but needs only to be
	copied, do that (`strcpy`), again instead of using `sprintf`.

	Fixes <https://savannah.gnu.org/bugs/?60977>.

2021-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix Savannah #60971.

	* src/preproc/html/pre-html.cpp (makeFileName): Consistently put
	a dash at the end of `macroset_template` whether the image file
	name stem is user-supplied or the default.  Stop adding the dash
	before the image number in `image_template` instead.  This makes
	the image file name format reliable whether the image needs to
	be subdivided (eqn) or not (tbl).

	Fixes <https://savannah.gnu.org/bugs/?60971>.

2021-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Reduce noise to standard error stream.

	* src/preproc/html/pre-html.cpp (imageList::createImage): Fix
	apparent oversight: `EXE_EXT` was not being applied to the
	second of three commands being run in a pipeline (did Windows
	users notice?).  Also issue (undocumented!) `-quiet` option to
	`pnmtopng` to shut up its commentary about counting colors.

2021-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Stop discarding standard error output.

	* src/preproc/html/pre-html.cpp (html_system): Stop sending the
	standard error stream to /dev/null; this just makes debugging
	harder, and doesn't produce much more output for well-formed
	input documents.  Rename `save_stdout` to `saved_stdout`.

2021-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Fix misspelled variable.

	* src/preproc/html/pre-html.cpp: Rename `IMAGE_BOARDER_PIXELS`
	to `IMAGE_BORDER_PIXELS`.

2021-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[libgroff, troff]: Add debug diagnostic level.

	* src/include/error.h: Declare functions
	`debug_with_file_and_line` and `debug`.
	* src/libs/libgroff/error.cpp: Add `DEBUG` to enum `error_type`.
	(do_error_with_file_and_line): Add case for `DEBUG` in switch.
	(debug, debug_with_file_and_line): Add new functions.

	Do the same for troff since it has a private implementation of
	the diagnostic functions (thanks to `output_warning()`).

	* src/roff/troff/input.cpp: Add `DEBUG` to enum `error_type`.
	(do_error_with_file_and_line): Add case for `DEBUG` in switch.
	(debug, debug_with_file_and_line): Add new functions.

2021-07-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/hpftodit/hpftodit.cpp (hp_msl_to_ucode_name)
	(unicode_to_ucode_name): Hush "format nonliteral" compiler
	warnings by using a preprocessor-defined string literal as an
	sprintf() format string instead of a C++ variable that just
	compared identically to the same thing.

2021-07-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/hpftodit/hpftodit.cpp (show_symset): Prevent
	sprintf() from overunning a static buffer.  Thanks to Bjarni
	Ingi Gislason for the report.  Resize buffer to be large enough
	to accommodate a 64-bit unsigned int type formatted as decimal.
	Also add assert() before the sprintf() to abort if the int type
	is even larger than that.  Use "%u" conversion instead of "%d"
	since the quantity is unsigned.
	(hp_msl_to_ucode_name): Similar, but for a signed int.
	(unicode_to_ucode_name): Similar, but for a signed int formatted
	as (unsigned) hexadecimal.

	Fixes <https://savannah.gnu.org/bugs/?60964>.

2021-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh: Refactor, mostly by relocation.  Move
	locale character set inference logic so that we only run it if
	we have to (`-T` option was invalid or not given and
	`GROFF_TYPESETTER` was not set in the environment or invalid).
	Initialize `T` variable as empty.

2021-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh: Use Version 7 Unix sh-compatible form
	of parameter expansion; per the GNU Autoconf manual[1], "[o]ld
	BSD shells, including the Ultrix sh, don't accept the colon for
	any shell substitution, and complain and die."  This is also the
	form of such substitutions used elsewhere in the script, so they
	should be mutually consistent.

	[1] https://www.gnu.org/software/autoconf/manual/autoconf-2.60/\
	html_node/Shell-Substitutions.html

2021-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh: Slightly refactor.  Rename formerly
	unused loop index variable from `i` to `arg` to leverage it in a
	later diagnostic message without a separate definition.  Inside
	the loop, expand `arg` instead of positional parameter 1, the
	meaning of which is less obvious after the parameter list is
	shifted by the new `is_option_argument_pending` logic (commit
	2b955c57, 20 July).

2021-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.1.man (Options) <-S>: Fix error: `-S`
	sets safer mode (redundantly) but is not passed to pic and troff
	as was claimed.

2021-07-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/number.cpp (parse_term): Tweak diagnostic
	messages.  When a left operand to a binary operator is empty,
	report the operator in question (helpful for string
	interpolations in complex expressions).  When handling input
	scaling indicators, drop word "this" from "this context", since
	the parser's context might not be clear from a file name and
	line number.  Say "scaling indicator" instead of "scale
	indicator".
	(parse_expr, parse_term): Rename function parameter from
	`scale_indicator` to `scaling_indicator`.

2021-07-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (define_color): Tweak warning
	diagnostics for clarity.  Only one value is expected when
	defining a color in the `gray` color space.  Quote recognized
	color space names when complaining of an unknown one.

2021-07-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	[nroff]: Pass a supplied `-c` option to groff.  While at present
	this does little more than `-P-c` already achieves, that might
	not be true forever.  Further, there is a distinction between
	ignoring color-related requests in groff input documents and
	ignoring color-related commands in device-independent output.
	This distinction would make it unwise to adapt `-c` to any other
	purpose in nroff in the future.

	* NEWS: Update item from commit dd725dce, 10 February 2020.
	* src/roff/nroff/nroff.sh: Pass `-c` option to groff in addition
	to synthesizing a `-P-c` option (for grotty) when it is seen.
	* src/roff/nroff/nroff.1.man (Options): Document `-c` as an
	option recognized by troff(1).

2021-07-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[nroff]: Support space between option flags and their arguments.

	* src/roff/nroff/nroff.sh: Add new `is_option_argument_pending`
	flag to add an additional state to the option parser.  Set it if
	an argument-requiring option is encountered with no abutting
	argument.  If it is set when a new argument is encountered,
	absorb the argument into the groff option list and clear the
	flag.  Modernize script in a couple of other ways.
	  - Exit with status 2 upon usage errors so that this condition
	    is easily distinguished from a groff abort (which exits with
	    status 1).
	  - Test shell variables for non-nullity with test(1) -n
	    operator instead of a string comparison.
	* src/roff/nroff/tests/verbose_option_works.sh: Test correct
	construction of groff command using this input form.
	* src/roff/nroff/nroff.1.man (Options): Add spaces between
	option flags and option arguments.  Sync metasyntactic variable
	names with groff(1) while we're at it.
	(Description): Drop sentence warning of whitespace prohibition.
	(Exit status): Add new section.

	Fixes <https://savannah.gnu.org/bugs/?60943>.

2021-07-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (main): Emit error diagnostic if `-d`
	or `-r` option is given a malformed argument.  This prevents a
	string or register with an empty name from being created.

	Fixes <https://savannah.gnu.org/bugs/?60935>.

2021-07-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh:
	* src/roff/troff/input.cpp (usage): Use "dev" as metasyntactic
	variable name for -T option argument to achieve consistency with
	our other documentation.

2021-07-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	[groff]: Comment out vestiges of gideal support.  It would be
	lovely to have, but no free (and GPL-compatible) implementation
	has showed up after decades of waiting.  Production of the
	original was a Ph.D. thesis.  Excited by de Moivre's theorem?
	Take a stab at it.

	* src/roff/groff/groff.cpp (main): Comment out effect of `-J`
	option.  It remains recognized, but silently ignored (instead of
	attempting to execute a nonexistent preprocessor).
	(synopsis): Add comment reminding us to document the option if
	we ever get the support.
	(help): Comment out documentation of option.

2021-07-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[[gnt]roff]: Make usage messages more accurate.

	* src/roff/groff/groff.cpp (synopsis): Drop `-h` and `-v` from
	normal operation synopsis.  Sort options in en_US lexicographic
	order.  Tighten presentation of alternate usage forms.
	(help): Document longer forms of `-d` and `-r`.
	* src/roff/nroff/nroff.sh: Report `$prog` instead of "nroff"
	literal.  Refer to `-P` option argument as "arg" instead of
	"opt", for consistency with groff usage message.  Use opposite
	case from option letter for option argument.
	* src/roff/troff/input.cpp (usage): Put brackets around options.
	Sort options in en_US lexicographic order.  Drop `-v` from
	normal operation synopsis.  Use opposite case from option letter
	for option argument.  Put operand name in capitals.  Set valid
	usage forms on one physical line each (see 89648fb4, 5 June).
	Add synopsis line for alternate usage forms.

2021-07-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Refactor environment initialization, switching, and
	copying.

	* src/roff/troff/env.cpp: Rename struct `env_list` to
	`env_list_node` since it describes a node of a singly-linked
	list.  Remove constant `NENVIRONMENTS` and array `env_table`.
	Add static symbol `default_environment_name` to replace string
	literal.
	(init_environments): Stop initializing `curenv` through
	`env_table`.  Use `default_environment_name` for that
	initialization and add the default environment to
	`env_dictionary`.
	(environment_switch): Simplify.  Shorten "dummy environment"
	diagnostic message.  Stop creating an integer-named
	environment inside the `env_table` array, only falling through
	to use the `env_dictionary` if the named environment is not a
	valid integer or if the array is full.  Instead use
	`env_dictionary` always.  Drop no longer needed `pop`
	quasi-Boolean integer with extra state to suppress environment
	stack underflow errors.  Instead report the error if underflow
	occurs, regardless of any other circumstance.
	(environment_copy): Simplify.  Stop searching the `env_table`
	array for an environment to copy from, only falling through to
	use the `env_dictionary` if the named environment is not a valid
	integer or if the array is full.  Instead search
	`env_dictionary` always.  Emit "no environment specified to copy
	from" diagnostic only if the `evc` request is given no argument.
	If the source environment to copy from is given but not found,
	emit a new diagnostic naming the nonexistent environment.  Fix
	bug: stop returning early if no copying could be done; instead
	fall through to the end of the function, which calls
	`skip_line()` and prevents anything on the remainder of the
	{invalid} control line from being interpreted.  Problem dates
	back to commit da3b7137, 6 March 2000 (groff 1.16).

	Fixes <https://savannah.gnu.org/bugs/?60913>.

2021-07-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/evc_produces_no_output_if_invalid.sh:
	  Regression-test Savannah #60913.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2021-07-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Update English hyphenation patterns.

	* NEWS: Add item.
	* tmac/hyphen.en: Update file using `hyph-en-us.tex` patterns
	file from the TeX hyph-utf8 project.
	* tmac/hyphenex.en: Remove explicit hyphenations for words that
	no longer require them when using the new patterns.  Add one
	item scraped from an erratum comment in hyphen.en
	{"dem-o-crat"}.

	The new patterns likely _will_ change the automatic hyphenation
	break points of your English documents.  Here is a sample of
	affected words found within groff's own documentary corpus.

	OLD			NEW
	===			===
	ar‐range‐ment		arrange‐ment
	col‐umns		columns
	con‐struc‐ted		con‐structed
	cus‐tom‐ized		cus‐tomized
	def‐i‐ni‐tions		de‐f‐i‐n‐i‐tions
	der‐i‐va‐tions		de‐riva‐tions
	hy‐phen‐a‐tion		hy‐phen‐ation
	ma‐te‐rial		ma‐te‐r‐ial
	Mi‐cro‐soft		Mi‐crosoft
	pipe‐lines		pipelines
	post‐pro‐ces‐sors	post‐proces‐sors
	pro‐cessed		processed
	pro‐cesses		processes
	spa‐ces			spaces
	Wer‐ner			Werner

2021-07-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Add unit test for `substring` request.

	* src/roff/groff/tests/substring_works.sh: Do it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2021-07-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Remove compatibility mode save registers after using
	them.

	* tmac/an.tmac:
	* tmac/andoc.tmac:
	* tmac/cp1047.tmac:
	* tmac/devtag.tmac:
	* tmac/ec.tmac:
	* tmac/fallbacks.tmac:
	* tmac/latin1.tmac:
	* tmac/latin2.tmac:
	* tmac/latin5.tmac:
	* tmac/latin9.tmac:
	* tmac/papersize.tmac:
	* tmac/pdfpic.tmac:
	* tmac/psold.tmac:
	* tmac/pspic.tmac:
	* tmac/trace.tmac:
	* tmac/unicode.tmac: Do it.

	* doc/groff.texi (Implementation Differences):
	* man/groff_diff.7.man (Implementation Differences): Illustrate
	doing so in relevant examples.

2021-07-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/troffrc: Load the English localization file `en.tmac` by
	default, instead of dealing with hyphenation language and
	patterns directly in this file.  (This also replaces a
	localization-determination mechanism that was never part of a
	groff release.)

	* src/roff/groff/tests/initialization_is_quiet.sh:
	* src/roff/groff/tests/localization_works.sh: Rewrite to use
	explicit macro file loading localization mechanism.

2021-07-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	Move core man(7) implementation to an.tmac.

	* tmac/an.tmac: Delete andoc-sourcing wrapper.

	* tmac/an-old.tmac: Rename...
	* tmac/an.tmac: ...to this.

	* tmac/tests/an-old_AT-and-UC-footer-saved-and-restored.sh:
	* tmac/tests/an-old_CS-register-off.sh:
	* tmac/tests/an-old_CS-register-on.sh:
	* tmac/tests/an-old_CS-register-unspecified.sh:
	* tmac/tests/an-old_CT-register-off.sh:
	* tmac/tests/an-old_CT-register-on.sh:
	* tmac/tests/an-old_CT-register-unspecified.sh:
	* tmac/tests/an-old_FT-bad-value-should-not-trash-titles.sh:
	* tmac/tests/an-old_LL-init-sanely.sh:
	* tmac/tests/an-old_TH-repairs-ad-damage.sh:
	* tmac/tests/an-old_TH-repairs-hy-damage.sh:
	* tmac/tests/an-old_TS-do-not-keep-tables-when-cR-set.sh:
	* tmac/tests/an-old_X-register-works.sh:
	* tmac/tests/an-old_avoid-two-font-denial-of-service.sh:
	* tmac/tests/an-old_no-break-after-short-paragraph-tags.sh:
	* tmac/tests/an-old_page-footers-present.sh:
	* tmac/tests/an-old_page-header-has-current-data.sh:
	* tmac/tests/an-old_title-abbreviation-works.sh: Rename...

	* tmac/tests/an_AT-and-UC-footer-saved-and-restored.sh:
	* tmac/tests/an_CS-register-off.sh:
	* tmac/tests/an_CS-register-on.sh:
	* tmac/tests/an_CS-register-unspecified.sh:
	* tmac/tests/an_CT-register-off.sh:
	* tmac/tests/an_CT-register-on.sh:
	* tmac/tests/an_CT-register-unspecified.sh:
	* tmac/tests/an_FT-bad-value-should-not-trash-titles.sh:
	* tmac/tests/an_LL-init-sanely.sh:
	* tmac/tests/an_TH-repairs-ad-damage.sh:
	* tmac/tests/an_TH-repairs-hy-damage.sh:
	* tmac/tests/an_TS-do-not-keep-tables-when-cR-set.sh:
	* tmac/tests/an_X-register-works.sh:
	* tmac/tests/an_avoid-two-font-denial-of-service.sh:
	* tmac/tests/an_no-break-after-short-paragraph-tags.sh:
	* tmac/tests/an_page-footers-present.sh:
	* tmac/tests/an_page-header-has-current-data.sh:
	* tmac/tests/an_title-abbreviation-works.sh: ...to these.

	* tmac/tmac.am (TMACNORMALFILES): Remove an-old.tmac.
	(tmac_TESTS): Reflect renames of test files above.
	(tmac/stamp-wrap): Macro-source `an.tmac` in the man wrapper.

	* tmac/andoc.tmac: Refer to (and macro-source) an.tmac.
	* tmac/man.tmac: Macro-source `an.tmac`, not `andoc.tmac`.
	* tmac/tests/andoc_flush-between-packages.sh: Call groff with
	`-mandoc` option instead of `-man`.  Henceforth, if you want the
	andoc wrapper, you have to ask for it.

	* tmac/an.tmac: Drop "-old" nomenclature.

	* PROBLEMS:
	* doc/groff.texi (man):
	* tmac/man.local: Update documentation appropriately.

	* NEWS: Add item.

	* man/groff_tmac.5.man (Macro packages/man pages):
	* src/roff/groff/groff.1.man (Usage/Macro packages): Update
	discussion of an, doc, and andoc.
	* tmac/groff_man.7.man.in (Files): Update descriptions of
	an.tmac, andoc.tmac, man.tmac, and mandoc.tmac.

	Fixes <https://savannah.gnu.org/bugs/?60789>.

2021-07-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Slightly refactor.  Make the source code slightly more
	accessible by using a `bool` type for a function's default
	parameter used as a Boolean, and comment it at call sites where
	the default is overridden.

	* src/roff/troff/token.h (get_name, get_long_name): Change type
	of parameter from `int` to `bool` and default from 0 to `false`.
	* src/roff/troff/input.cpp (do_get_long_name)
	(empty_name_warning, get_name, get_long_name): Change type of
	parameter from `int` to `bool` in declarations and definitions.
	* src/roff/troff/column.cpp (column_justify):
	* src/roff/troff/div.cpp (diversion_trap):
	* src/roff/troff/env.cpp (environment_switch, environment_copy)
	(do_input_trap, set_hyphenation_language)
	(do_hyphenation_patterns_file):
	* src/roff/troff/input.cpp (define_color, composite_request)
	(do_define_string, do_define_macro, rename_macro, alias_macro)
	(chop_macro, do_string_case_transform, substring_request)
	(length_request, asciify_macro, unformat_macro, do_register)
	(device_macro_request, do_if_request, do_source)
	(ps_bbox_request, do_open, close_request, do_write_request)
	(write_macro_request, define_class, copy_file, vjustify)
	(transparent_file, do_macro_source):
	* src/roff/troff/node.cpp (font_translate, font_position, style)
	(get_fontno):
	* src/roff/troff/reg.cpp (define_number_reg, inline_define_reg)
	(alter_format, alias_reg, rename_reg): Update call sites.  Add
	(comment indicating meaning of parameter.

	Do similarly for token::delimiter() member function.

	* src/roff/troff/token.h (token::delimiter): Change type of
	parameter from `int` to `bool`, name from `warn` to `err` (to
	match definition and behavior in input.cpp) and default from 0
	to `false`.
	* src/roff/troff/input.cpp (token::delimiter): Change type of
	parameter from `int` to `bool` in definition.
	* src/roff/troff/input.cpp (do_expr_test, get_delim_number)
	(get_line_arg, read_size, do_register, read_draw_node):
	* src/roff/troff/reg.cpp (inline_define_reg): Update call sites.
	Add comment indicating meaning of parameter.

2021-07-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-footer): Remove string
	`an-outer-footer-text` after we're done with it.

2021-07-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	Remove the stripper script and its vestiges.

	* contrib/hdtbl/hdmisc.tmac:
	* contrib/hdtbl/hdtbl.tmac:
	* contrib/mom/om.tmac:
	* tmac/doc.tmac:
	* tmac/e.tmac:
	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff:
	* tmac/mdoc/doc-syms: Remove `%beginstrip` comment.

	* tmac/strip.sed: Delete.

	* tmac/tmac.am (EXTRA_DIST): Stop shipping `strip.sed`.

	Fixes <https://savannah.gnu.org/bugs/?55091>.

2021-07-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	Skip the stripper, part 3/3 (mdoc).

	* tmac/doc-old.tmac-u:
	* tmac/doc.tmac-u:
	* tmac/mdoc/doc-common-u:
	* tmac/mdoc/doc-ditroff-u:
	* tmac/mdoc/doc-nroff-u:
	* tmac/mdoc/doc-syms-u: Rename these...

	* tmac/doc-old.tmac:
	* tmac/doc.tmac:
	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff:
	* tmac/mdoc/doc-syms: ...to these.

	* tmac/tmac.am (TMACNORMALFILES): Add `doc-old.tmac` and
	`doc.tmac`.
	(TMACUNSTRIPFILES, TMACSTRIPFILES): Delete variables.
	(dist_tmac_DATA): Drop `$(TMACUNSTRIPFILES)`.
	(nodist_tmac_DATA): Drop `$(TMACSTRIPFILES)`.
	(TMACMDOCSTRIPFILES): Rename...
	(TMACMDOCFILES): ...to this.
	(nodist_mdoc_DATA, MOSTLYCLEANFILES): Reflect above rename.
	(nodist_mdoc_DATA): Rename...
	(dist_mdoc_DATA): ...to this.
	(TMACMDOCUNSTRIPFILES): Delete variable.
	(EXTRA_DIST): Drop `$(TMACMDOCUNSTRIPFILES)`.
	($(TMACSTRIPFILES), $(TMACMDOCSTRIPFILES)): Drop targets.

	The portions above are based on a patch by Ingo Schwarze.

	* tmac/doc.tmac:
	* tmac/mdoc/doc-common:
	* tmac/mdoc/doc-ditroff:
	* tmac/mdoc/doc-nroff:
	* tmac/mdoc/doc-syms: Bracket macro definitions tightly with
	`eo` and `ec` requests since they were written under this
	assumption.  The files in general were also drafted under the
	assumption that they'd be stripped, so `eo` was in effect for
	broad swaths of the file including portions outside of any macro
	definition where comments were used.  But comments are expressed
	using the escape character!  So we got warnings about an
	undefined '\"' macro, and that was just the beginning of a
	wrecking ball of trouble that smashed through the
	implementation.  Some--but not all--string definitions (and
	appendments) needed to be bracketed with `eo` and `ec` as well,
	to delay interpolation of embedded string names that are not
	defined until macros interpolate them later.  I did what
	appeared necessary to pass our tests and keep -Tutf8 and -Tps
	renderings of tmac/groff_mdoc.7 from changing from their
	strip-influenced output.  Subtle bugs might linger, but some
	won't be the fault of the unstripping process.  (For instance,
	try provoking a usage message on the `Hf` macro.)

2021-07-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man pages]: Remove compatibility save register.

	* **/*.man*: Remove page-local compatibility save register after
	using it.

2021-07-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Simplify `mso` requests.

	* tmac/X.tmac:
	* tmac/Xps.tmac:
	* tmac/dvi.tmac:
	* tmac/html.tmac:
	* tmac/lbp.tmac:
	* tmac/lj4.tmac:
	* tmac/ps.tmac:
	* tmac/tty-char.tmac:
	* tmac/tty.tmac:
	* tmac/www.tmac.in: Move `mso` requests to be inside regions
	where compatibility mode is turned off.  I believe they were
	placed where they were because things didn't work when the
	compatibility mode register being saved was .C, rather than the
	.cp register introduced in commit 6a37bb5f, 17 April 2020.  Now
	the logic is less mysterious.  Also, remove the register used to
	save compatibility mode after we're done with it, to reduce name
	space clutter.

2021-07-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/it.tmac: Drop sourcing of `latin1.tmac` and set up of
	hyphenation codes; since the `hyphen.it` file is pure ASCII, we
	don't need to expect Latin-1-encoded code points in it.

2021-07-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Make localization files work in compatibility mode.

	* tmac/cs.tmac:
	* tmac/de.tmac:
	* tmac/en.tmac:
	* tmac/fr.tmac:
	* tmac/it.tmac:
	* tmac/ja.tmac:
	* tmac/sv.tmac:
	* tmac/zh.tmac: Save and restore compatibility mode.

	* tmac/den.tmac: Invoke requests with `do`.

	Fixes <https://savannah.gnu.org/bugs/?60874>.  Thanks to Bjarni
	Ingi Gislason for the report.

2021-07-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #60874.

	* src/roff/groff/tests/initialization_is_quiet.sh: Test it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2021-07-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	Integrate Italian localization.

	* NEWS: Add item.  Update an existing list of localization macro
	files.
	* doc/groff.texi (Manipulating Hyphenation):  Update table of
	hyphenation pattern left and right minimums and list of
	available localization files to include Italian.
	* man/groff_tmac.5.man: Update list of available localization
	files to include Italian.
	* src/roff/groff/tests/localization_works.sh: Test it.
	* tmac/tmac.am (TMACNORMALFILES): Add `it.tmac` and `hyphen.it`.

	Fixes <https://savannah.gnu.org/bugs/?60828>.

2021-07-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Flesh out Italian localization.

	* tmac/hyphen.it: Add hyphenation patterns from TeX hyph-utf8
	project.
	* tmac/it.tmac:
	  - Revise copyright date to just this year (it had been copied
	    from fr.tmac).
	  - Use grave accents instead of acute ones to indicate stress
	    on word-final vowels.  Per the University of Wikipedia and a
	    sampling of apparently well-typeset Italian language
	    documents online, this appears to be correct.  Yell at me if
	    I'm wrong.
	  - Source latin1.tmac instead of latin9.tmac; Italian doesn't
	    require any letter code points from Latin-9, unlike the
	    French file upon which this one was based, and Latin-1 is
	    less of a pain to work with.
	  - Set the hyphenation mode to 1 instead of 4 for congruence
	    with the requirements of the hyphenation patterns.
	  - Set up hyphenation codes.  This (and sourcing latin1.tmac)
	    might not be necessary as the hyphenation pattern file, of a
	    more recent vintage than the others we're using, is pure
	    ASCII.  However I don't understand these issues perfectly so
	    I am making the conservative choice.  Again per the
	    University of Wikipedia, Italian requires only acute and
	    grave accents, in contrast to the rich French diacritical
	    bouillabaisse.
	  - Set the hyphenation language and load the pattern file.
	  - Add comments in parallel with other localization files and
	    to supply text editors with hints.

2021-07-02  Edmond Orignac <edmond.orignac@wanadoo.fr>

	* tmac/it.tmac: Add Italian localization.

2021-07-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	Skip the stripper, part 1/3 ("me").

	* tmac/e.tmac-u: Rename to...
	* tmac/e.tmac: ...this.

	* tmac/tmac.am (TMACNORMALFILES): Add tmac/e.tmac.
	(TMACUNSTRIPFILES): Remove tmac/e.tmac-u.
	(TMACSTRIPFILES): Remove tmac/e.tmac.

	Fixes one third of <https://savannah.gnu.org/bugs/?55091>.

2021-07-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl: Simplify parsing.  Dave Kemper pointed
	out that preprocessors like pic(1) use pretty unsophisticated
	*roff parsing to determine where to perform their textual
	replacements.  My enhancements to support input line
	continuation and cope with brace escapes were thus
	overengineered.  Remove them.
	  - Drop scalars `is_continued_line` and `logical_line`.
	  (do_line): Stop performing logical line concatenation and
	  detecting input line continuation.  Perform operations on
	  `line` instead of `logical_line`.  Stop removing brace
	  escapes.
	* src/utils/grog/grog.1.man (Limitations): Update discussion.

	Fixes <https://savannah.gnu.org/bugs/?60862>.  Thanks, Dave!

2021-06-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/reg.cpp (lookup_number_reg, alias_reg): In
	diagnostic messages, say simply "register" instead of "number
	register" (there is no other kind).

2021-06-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Refactor input parsing.

	* src/utils/grog/grog.pl:
	  - Add scalar `use_compatibility_mode` (see below).
	  - Add list `request` to store the names of all requests
	    recognized by groff so that they aren't confused with macro
	    names.
	  - Add scalars `have_seen_first_macro_call` (replaces
	    `before_first_command`, but at global scope),
	    `is_continued_line` and `logical_line`.  The latter two
	    enable us to handle *roff input line continuation correctly.
	  (process_arguments): Set `use_compatibility_mode` if `-C`
	  option specified.
	  (process_input): Refactor to greatly simplify, to not attempt
	  to read the first line of an input file as a special case, and
	  to avoid sending `do_line` an undefined argument (when EOF is
	  reached).
	  (do_first_line): Delete.
	  (do_line): Rewrite the early stages of input parsing.
	  - Concatenate continued input lines, setting
	    `is_continued_line` and returning early as each one is seen,
	    storing the accumulating input in `logical_line`.
	  - Check the input line for the form of comment deposited by
	    Perl's Pod::Man, which uses a highly accented dialect of
	    man(7); if it's present, inflate `man_score` to compensate
	    for the page-private `IX` macro it defines but which
	    duplicates the name and function of a 4.2BSD-era ms(7)
	    extension that would otherwise deceive our scoring
	    mechanism, because Pod::Man produces `IX` calls to
	    metastatic excess.  (An alternative to this kludge is
	    documented in comments: if a "standard" macro is redefined,
	    we could delete it from the relevant lists and hashes.)
	  - Strip *roff comments from input.
	  - Normalize control lines; convert the no-break control
	    character to the regular one and remove unnecessary
	    white space.
	  - Remove brace escapes.
	  - Recognize two-character macro calls when not followed by
	    white space in compatibility mode.
	  - Drop logic that erroneously attempted to infer soelim(1) use
	    from macro calls and request invocations.  The grog(1) and
	    soelim(1) man pages now both explain why such an effort was
	    misguided.
	  - Recognize macro definitions created by .am and .am1 requests
	    {not just .de and .de1}.
	  - Ignore all other *roff requests.
	  - What remains must be a ("standard") macro call, so set
	    `have_seen_first_macro_call`.

	* src/utils/grog/grog.1.man (Limitations): Document a further
	restriction: don't change the escape character, either.

	* src/utils/grog/tests/smoke-test.sh: Comment out pic-detection
	test on soelim(1).  The pic macro calls are guarded by roff
	control structures and only worked previously by accident
	because grog did not recognize *roff input line continuation,
	now it does and the illusion is dispelled.  (A reliable way to
	fool grog before and after my refactoring is now documented in
	its man page.)

	Fixes <https://savannah.gnu.org/bugs/?59622>.

2021-06-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #59622.

	* src/utils/grog/tests/recognize-perl-pod.sh: Test it.
	* src/utils/grog/grog.am (grog_TESTS): Run test.

2021-06-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.1.man (Limitations): Document further
	restrictions (no changing of control characters, control
	structures not interpreted).

2021-06-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Refactor command-line argument handling.

	* src/utils/grog/grog.pl:
	  - Drop scalars `groff_opts`, `device`, and `with_warnings`.
	  - Move scalar `pdf_with_ligatures`...
	  (process_arguments): ...here.  Recognize all groff options
	  that take an optionally whitespace-separated option argument
	  and apply the existing "delayed option" handling to them.
	  Push any groff option except `-m` as-is onto the constructed
	  groff command's argument list (`-m` handling is unchanged).
	  Match long option names exactly, not sloppily.  Stop
	  recognizing `--warnings` option.  Emit error diagnostic if
	  unrecognized long option encountered.
	  (infer_device): Delete subroutine and its top-level call site.
	  (help): Undocument `--warnings`.

	* src/utils/grog/grog.1.man:
	  (Synopsis): Use font style macros instead of .OP.  Undocument
	  `--warnings`.
	  (Options): Note that the groff arguments produced by the grog
	  `--ligatures` option are supported only by the `pdf` device.
	  Undocument `--warnings`.  Undocument groff-incompatible
	  restriction on whitespace before option arguments; grog is
	  compatible now.  Simplify discussion in light of simplified
	  grog logic.
	  (Details): Undocument scenario where grog infers multiple
	  main/major/full-service macro packages; this no longer
	  happens.
	  (Examples): Update to no longer illustrate inclusion of `-T
	  ps` option; this no longer happens by default.

	* NEWS: Document removal of grog's `--warnings` option.

	Fixes <https://savannah.gnu.org/bugs/?57873>; groff options are
	no longer "mangled".

2021-06-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #57873.

	* src/utils/grog/tests/preserve-groff-options.sh: Test it.
	* src/utils/grog/grog.am (grog_TESTS): Run test.

2021-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Refactor device (`-T` option) handling.

	* src/utils/grog/grog.pl: Redeclare `device` as a scalar instead
	of a list.
	(process_arguments): Generalize handling of `-T` and `-m`
	options to permit optional whitespace.  Rename scalar `was_T` to
	`delayed_option`.
	(infer_device): Stop unconditionally adding a `-T ps` argument
	to the generated groff command.  Remove logic that validates any
	given `-T` option argument; instead, let groff fail if a bad one
	is supplied (its own diagnostics in this scenario were improved
	in commit 5a721a30, 27 May).  This makes grog agnostic about any
	differently configured default device in groff itself, and about
	the GROFF_TYPESETTER environment variable.

	Fixes <https://savannah.gnu.org/bugs/?55301> by getting out of
	the way.

	* src/utils/grog/tests/PF-does-not-start-pic-region.sh:
	* src/utils/grog/tests/smoke-test.sh: Update expected output.

2021-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.am (grog): Drop sed replacement of unused
	configuration variables @g@, @BINDIR@, @libdir@, and @EGREP@.
	* src/utils/grog/grog.pl (process_arguments, construct_command):
	Tweak warning diagnostics to use a style where an empty argument
	will be easy to spot.
	(do_first_line): Stop emitting pseudo-diagnostic (to standard
	output!) if we see a "groff options line" [it's not] of
	incorrect form.  The preprocessor encoding hint convention of
	concern here is particular to man pages, disregarded by at least
	one major implementation thereof (man-db man), and not used by
	other types of roff documents; at this point, we don't yet know
	if the document we're processing is a man page.
	(construct_command): Correct comment and related logic error.
	Clear the inferred main macro package if _any_ `-m` argument
	matching any main macro package is given.  Warn only if what is
	specified doesn't match the inference.

2021-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Heavily refactor.

	* src/utils/grog/grog.pl:
	  - Drop import of unused module `Data::Dumper`.
	  - Drop unused scalars `Sp` and `correct_tmac`.
	  - Simplify determination of version number.  Drop hash `at_at`
	    which only stored one key, `GROFF_VERSION`.  Initialize
	    scalar `groff_version` to "DEVELOPMENT".  Rename scalar
	    `before_make` to `in_source_tree` and initialize to zero.
	    Update `groff_version` with Automake-determined version
	    variable if it is defined (i.e., grog is not running outside
	    of, or in an unbuilt, groff source or binary distribution).
	  - Drop unused `Mparams` list.  Replace it with new list
	    `requested_package`, which stores the arguments to any grog
	    `-m` options specified by the user.
	  - Rename many objects so that I, and others, can better
	    comprehend their purpose, and for consistent letter casing.
	    . @Command -> @command
	    . @devices -> @device
	    . $Prog -> $program_name
	    . %macros -> %user_macro
	    . $have_any_valid_args -> $have_any_valid_arguments
	    . &handle_args -> &process_arguments
	    . &handle_whole_files -> &process_input
	    . @preprograms -> @preprocessor
	    . &make_groff_device -> &infer_device
	    . &make_groff_preproc -> &infer_preprocessors
	    . &make_groff_tmac_others -> &infer_macro_packages
	    . &make_groff_tmac_man_ms -> &infer_man_or_ms_package
	    . &make_groff_line_rest -> &construct_command
	  - Drop many unused keys in `Groff` hash.
	  - Add new lists, `macro_ms`, `macro_man`, and
	    `macro_man_or_ms` to support new scoring technique to
	    disambiguate input documents between these two packages.
	  - Append the foregoing 3 lists to new list `standard_macro`,
	    and add these as keys to the `Groff` hash.
	  - Add new list `main_package` to keep track of full-service
	    package names.
	  - Add new scalars `man_score`, `ms_score`, and
	    `inside_tbl_table` to aid disambiguation of .TH macro calls
	    and the many macro names shared between man(7) and ms(7).
	  (process_arguments): Strip '-m' off of argument before storing
	  the remainder in `@requested_package`.
	  (do_line): Detect .TH macro call even if white space occurs
	  between the control character and the macro name.
	  (do_line): Inflate `$man_score` by 100 if .TH is the first
	  macro call seen in a document.
	  (do_line): Fix bug; clear `$before_first_command` in correct
	  scope--after any macro call, not just if we saw a .TH as the
	  first macro call.
	  (do_line): Set `$inside_tbl_table` when we see a .TS call.
	  (do_line): Clear `$inside_tbl_table` when we see a .TE call.
	  Also increment `$Groff{'tbl')' again, increasing the "score"
	  of tbl(1) usage evidence.
	  (do_line): Drop a lot of code that manually increments %Groff
	  keys corresponding to man and ms macros.  This is now done
	  differently and elsewhere.
	  (do_line): Drop "P" from list of characteristic mm(7) macros.
	  (do_line): Simplify matching of mom(7) macros (match $command,
	  not $line).  Extend list of characteristic mom(7) macros.
	  (do_line): Increment $Groff{$key} if $key is in
	  @standard_macro.
	  (infer_man_or_ms_package): Rewrite.  Compute a score for each
	  package by counting occurrences of their characteristic
	  macros.  If both have a score of zero, assume that the input
	  is a raw roff document.  If the scores are equal
	  {doc/webpage.ms, startlingly, comes within 1 point of a tied
	  score}, infer ms(7) if 'TH' was never called, and if it was,
	  issue a diagnostic advising user to supply a disambiguating
	  `-m` option.  Otherwise, the scores are unequal: infer the
	  package of the winner.  Set scalar `inferred_main_package`
	  instead of pushing `-m` options onto `@m`.
	  (infer_macro_packages): Set scalar `inferred_main_package`
	  instead of pushing `-m` options onto `@m`.  Explicitly return
	  0 if we fall off the end of the function.
	  (construct_command): Rewrite handling of -m options.  Add new
	  list `msupp` to store supplementary (non-main) macro package
	  arguments.  If a full-service package was explicitly
	  requested, it had better not clash with what we inferred.  If
	  it does, explicitly unset `inferred_main_package` so that the
	  -m arguments are placed in the same order that the user gave
	  them; caveat dictator.  If `--run` option was given, just
	  print the command; don't preface it with __FILE__ and __LINE__
	  noise.
	  - Remove comments documenting shared variables used by
	    subroutines.  These are far from useless but too tedious to
	    keep up to date while the code is in flux.
	  - Note several places for further code review or refactoring
	    with "XXX" comments.
	  - Add Vim modeline.

	grog now passes all its tests and correctly infers arguments for
	all in-tree groff documents (except for a known, and already
	documented in grog(1), false positive detection of soelim in
	soelim(1)).  This refactor also obviates or resolves several
	outstanding Savannah tickets.

	Fixes <https://savannah.gnu.org/bugs/?44707> by obviating it;
	grog no longer cares about file name extensions on man pages (or
	any other input).

	Fixes <https://savannah.gnu.org/bugs/?55302>; same.  The quality
	of diagnostic messages has been improved as well.

	Fixes <https://savannah.gnu.org/bugs/?59753>; same.

	Fixes <https://savannah.gnu.org/bugs/?59664>.  The attached
	patch was a less aggressive refactor of &do_line and %Groff.
	Its author made the following claim for it: "With this patch,
	all 'man', 'me', 'mom, and 'ms' files in the repository are
	correctly identified.  The only example of a 'mm'-file is
	"letter.mm", which is not recognized correctly."  As noted
	above, the present refactor achieves correct recognition of all
	of the files, including letter.mm.

2021-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/tests/smoke-test.sh: Perform whole-line
	matches.  Apply DRY principle to expected output.  In
	anticipation of pending changes to grog.pl, uncomment and add
	tests for several in-tree documents.
		doc/meref.me
		contrib/mom/examples/copyright-chapter.mom
		contrib/mom/examples/copyright-default.mom
		contrib/mom/examples/letter.mom
		contrib/mom/examples/mom-pdf.mom
		contrib/mom/examples/mon_premier_doc.mom
		contrib/mom/examples/sample_docs.mom
		contrib/mom/examples/slide-demo.mom
		contrib/mom/examples/typesetting.mom
		doc/webpage.ms

2021-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Refactor.  Discard filename extension-based inference.

	* src/utils/grog/grog.pl (do_line): Stop saving the control
	character in the matched scalar `command` (the request or macro
	name).  We don't need it, and it simplifies much later matching.
	(handle_file_ext): Delete.
	(top level): Drop call site.

	* src/utils/grog/grog.pl: Rename `tmac_ext` scalar to
	`inferred_main_package`.

2021-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.pl (handle_args): Complain less noisily
	and more comprehensibly when given unrecognized groff options.

2021-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Handle "--" argument as documented.

	* src/utils/grog/grog.pl (handle_args): Rename scalar
	`double_minus` to `no_more_options` so it actually communicates
	something.  Drop openability check of operand encountered after
	"--"; since it's on the operand list, it will be checked later
	{in `handle_whole_files`}.  Stop pushing "--" itself onto the
	`filespec` list.

	Fixes <https://savannah.gnu.org/bugs/?60834>.

2021-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Revise operand handling, diagnostics, and exit status.

	* src/utils/grog/grog.pl: Track more state so that we can
	process the argument list more intelligently and exit with a
	meaningful status.  Add `had_inference_problem`,
	`had_processing_problem`, and `have_any_valid_args` Boolean
	scalars.
	(fail): Add diagnostic subroutine for serious problems; sets
	`had_processing_problem`.
	(handle_args, handle_file_ext): Stop complaining here about
	unopenable file operands.
	(handle_whole_files): Complain only here, with `fail` if a file
	operand cannot be opened.
	(make_groff_line_rest): Don't exit immediately if there is a
	macro package inference clash, because there might be more
	operands to process.  Instead, set `had_inference_problem`.
	Stop exiting from this subroutine.
	(top level): Only call the inference subroutines if we had a
	valid operand to work with (including an implicit read from
	stdin).  Exit with a status corresponding to the Booleans
	declared above.

	* src/utils/grog/grog.1.man (Exit status): Add section; describe
	semantics of exit status values.

	Fixes <https://savannah.gnu.org/bugs/?60833>.

2021-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Revise diagnostic messages.

	* src/utils/grog/grog.1.man (err): Rename from this...
	(warn): ...to this.  Prefix diagnostic with command name and
	diagnostic severity level.  The subroutine didn't change the
	exit status and was not used to report serious trouble, so
	"warning" seems appropriate.
	(make_groff_tmac_man_ms): Update call sites.  Modify diagnostic
	wording to stop calling macros "requests".

2021-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/grog.1.man (Limitations): Add subsection
	covering the problem grog has with soelim inference.  Undocument
	groff's -s option as one that can be inferred, because at
	present it cannot be.

	Prompted by Savannah #60421.

2021-06-26  Dave Kemper <saint.snit@gmail.com>

	[grog]: Fix erroneous detection of pic(1) usage.

	Fixes <https://savannah.gnu.org/bugs/?60772>.

2021-06-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/grog/tests/PF-does-not-start-pic-region.sh:
	  Regression-test Savannah #60772.
	* src/utils/grog/grog.am (grog_TESTS): Run test.

2021-06-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Add smoke test.

	* src/utils/grog/tests/smoke-test.sh: Add test.
	* src/utils/grog/grog.am (grog_TESTS): Run it.
	(TESTS): Add `grog_TESTS`.
	(EXTRA_DIST): Ship test.

2021-06-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grog]: Relocate in source tree.

	* src/roff/grog: Move from here...
	* src/utils/grog: ...to here.

	* MANIFEST:
	* Makefile.am:
	* src/utils/grog/grog.am: Reflect move.

	Fixes <https://savannah.gnu.org/bugs/?60788>.

2021-06-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Assigning Formats): Revise discussion.
	Clarify that a format never causes truncation of an interpolated
	magnitude.  Note that non-Arabic number formats cannot be used
	as operands to arithmetic expressions.  Add example of how to
	work around this.

2021-06-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Clarify diagnostics.

	* src/roff/troff/reg.cpp (reg::set_increment): Update diagnostic
	to unabbreviate "auto".
	(reg::alter_format): Update diagnostic to say "assign" instead
	of "alter", since the documentation consistently uses the former
	term.

2021-06-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[troff]: Slightly refactor.  Make the source code slightly more
	accessible by using a `bool` type for a member function's
	default parameter used as a Boolean, and comment it at call
	sites where the default is overridden.

	* src/roff/troff/token.h (token::get_char): Change type of
	parameter from `int` to `bool` and default from 0 to `false`.
	* src/roff/troff/input.cpp (token::get_char): Update definition.
	* src/roff/troff/env.cpp (hyphen_word):
	* src/roff/troff/node.cpp (remove_font_special_character):
	* src/roff/troff/input.cpp (do_overstrike, do_bracket, next)
	(do_define_character, remove_character, get_line_arg)
	(encode_char, do_if_request, do_translate, char_flags)
	(hyphenation_code, define_class): Update call sites.  Add
	comment indicating meaning of parameter.

2021-06-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): When outputting HTML, write the
	possibly case-transformed (but not yet abbreviated) page title
	as the `title` element instead of the unaltered first argument
	to `TH`.

2021-06-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-abbreviate-title): Define with `de`, not
	`de1`, since it is not intended for call by traps or users.

2021-06-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Tab Stops): Fix erroneous claim; tab stops are
	not set "every half inch across the page".  This is only true in
	"line tabs mode", which is not enabled by default.  The default
	behavior, to keep compatibility with AT&T troff, measures tab
	stops relative to the current position on the input line.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-nroff-u: Set the usekeeps register used by tbl
	to the logical complement of the cR (continuous rendering)
	register.  This prevents blank lines from creeping into tables
	in that mode.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-blank-line-trap, an-leading-space-trap):
	We say in a comment, "Macros ... that are called by traps of any
	kind must be defined with `de1` because they might be called
	from a context where compatibility mode is enabled."  So do it.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-header): Lightly refactor; tighten.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-write-paragraph-tag): Lightly refactor
	for clarity and to reduce code duplicated in both branches of an
	`ie`/`el` structure.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Rename `an-HF-remap-I-style` register to
	`an-remap-I-style-in-headings` for greater clarity.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common-u (doc-header, doc-end-macro): Partially
	revert bf4b3dde (from 20 May); per Ingo Schwarze, continuous
	rendering in mdoc(7) documents has always used only one vee
	between headers, footers, and man page body text.

2021-06-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/en.tmac: Stop using `do` request; it's unnecessary since
	the file is already loaded with compatibility mode off.

2021-06-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Fix doc omission; .ID can take an argument.

	* doc/groff.texi (ms Document Control Settings) <DI>:
	Characterize register setting as a _default_.
	(ms Displays and Keeps): Add optional variable "indent" argument
	to syntax summary of ".DS I" and ".ID".  Note that the given
	indentation is used if present, and \n[DI] otherwise.
	* doc/ms.ms (Displays and keeps): Add optional variable "indent"
	argument to syntax summary of ".ID".  Switch fonts more
	carefully and apply italic corrections.
	* tmac/groff_ms.7.man (Displays and keeps): Sync with doc/ms.ms.

2021-06-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Properly situate devtag flag-related register
	names in the package name space.  Rename `need_eo_h` to
	`s@devtag-needs-end-of-heading'.  Rename `need_eo_tl` to
	`s@devtag-needs-end-of-title`.
	((initialization), par@reset, @SH, par@finish, @NH): Do it.
	(par@reset): Test their values more idiomatically.

	Fixes last third of <https://savannah.gnu.org/bugs/?42515>.

2021-06-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac-u (@h): Migrate SCCS revision 2.37 to be idiomatic
	for groff (and not throw warnings of type 'mac').

2021-06-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Improve diagnostics during documentation
	generation; none should occur normally, but when they do, seeing
	troff complain about "<standard input>" is disheartening.
	(DOC_GROFF_ONLY): Add -b option so we get backtraces (also kill
	off trailing whitespace).
	(DOC_GROFF):
	(doc/pic.html):
	(doc/webpage.html): Add sed expression to inject `lf` request
	into the stream to identify the file being processed.

2021-06-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/me-revisions: Supplement history with subsequent BSD work
	from versions 2.29 (1988-04-22) to 8.1 (1993-06-05).

2021-06-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/me-revisions: Add 'me' macro package revision log, scraped
	from <https://svnweb.freebsd.org/csrg/share/me/revisions>.
	* doc/doc.am (DOCFILES): Ship it.

2021-06-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac-u: Rename registers for clarity.  Unlike other
	macro packages supplied by groff, "me" mostly remains within the
	AT&T 2-character name space, accessing extended names
	selectively through `do` and `de1` requests.  The package
	therefore has no characteristic name prefix.
	  need_eo_h  -> devtag-needs-end-of-heading
	  need_eo_tl -> devtag-needs-end-of-title
	  need_tl    -> devtag-needs-title
	(@html_check_need_title, sh, EQ): The foregoing registers are
	effectively Booleans, so perform Boolean-style tests on their
	interpolations.

	Fixes a second third of <https://savannah.gnu.org/bugs/?42515>.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/e.tmac-u: Work in compatibility mode.  It seems this was
	the intention (reasonable, since "me" originates in pre-groff
	BSD Unix), but there were several problems.
	(@R): Prefix register existence test with `do`.
	(@html_check_need_title): Define with `do` since the macro name
	is long, and also with `de1` so that we can freely use groff
	extensions within.  Drop many `do` requests from macro
	definition.
	(@check_need_title): Define with `do`, as above.  Add comment
	explaining why `de1` is not needed for this macro definition.
	(@S): Prefix macro/string existence test with `do`.  Remove
	spurious space so that the argument string name is truly defined
	as empty.
	(nm, n1, n2): Prefix handling of long register names `_#p` and
	`_#f` with `do` request.
	(top level): Prefix `mso` request with `do`.
	((x-html): Define with `do` and `de1` instead of `de`.  Drop
	now-unnecessary `do` requests from macro body.
	()x-html): Define with `do` and `de1` instead of `de` for
	symmetry.
	(xp-html): Define with `do` and `de1` instead of `de`.  Drop
	now-unnecessary `do` requests from macro body.

	Fixes <https://savannah.gnu.org/bugs/?60785>.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/devtag.tmac: Work in compatibility mode; define macros
	with the `de1` instead of the `de` request.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/refer-me.tmac:
	* tmac/refer.tmac: Add include guards.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/refer-me.tmac: Handle being loaded in compatibility mode.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Properly situate devtag flag-related
	register names in the package name space.  Rename `need_eo_h` to
	`an-devtag-needs-end-of-heading'.  Rename `need_col2` to
	`an-devtag-needs-second-column`.
	(an-input-trap, SH, SS, HP, (initialization)): Do it.
	(an-input-trap): Test their values more idiomatically.

	Fixes one third of <https://savannah.gnu.org/bugs/?42515>.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_if_request): Improve diagnostic
	message; say "conditional operator", not just "conditional".

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-end, an-header): In continuous rendering
	mode, use same spacing amount after header and before footer as
	mdoc in its own continuous rendering mode.  Thanks to Ingo
	Schwarze for the suggestion.

	Fixes <https://savannah.gnu.org/bugs/?60653>.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (P): Define this as the "canonical"
	paragraphing macro.
	(LP, PP): Make these aliases of P.

2021-06-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (spring_trap): Tighten lexical
	discipline; describe macro as "trap-called" rather than
	"trap-invoked".

2021-06-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Don't spuriously break a page after a paragraph tag when
	the tag is short enough to fit within the paragraph's
	indentation.

	* tmac/an-old.tmac (an-write-paragraph-tag): Reserve ("need") 2
	vees plus 1 basic unit of vertical space regardless of the width
	of the tag.  In the short tag case, we reverse space by one vee
	after outputting the diversion in which the tag is stored, but
	it will always contain a break, and by the time we reverse, we
	might have already hit a page location trap
	{an-break-body-text}, and by then it's too late to back up.

	* tmac/tests/an-old_no-break-after-short-paragraph-tags.sh: Test
	it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?60624>.

2021-06-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Rename environments to be more descriptive.
	  an-env -> an-env-header-or-footer
	  an-2   -> an-env-paragraph-tag
	(an-header, an-footer, an-write-paragraph-tag): Do it.

2021-06-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Add diagnostic error if .EQ used within .TS/.TE.
	Introduce register `tbl@within-table` to track whether we're
	inside a table.
	(@EQ): Check register and issue error if it is true.
	(@TS): Set register.
	(@TE): Clear register.

	Prompted by Savannah #55754.

2021-06-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Permit document to start with .PS.
	(cov*ab-init): Alias PS to @PS.
	(PS): Call LP, then re-execute (aliased) self as TS does.
	(TS): Update comment to parallel the one in PS.

2021-06-11  Tadziu Hoffmann <hoffmann@usm.uni-muenchen.de>

	Indent an IP paragraph based on the type size of the paragraph
	text, not a preceding heading.  We have to delay evaluating IP's
	argument until the font size has been reset, which I've
	attempted to do by simply passing the argument unevaluated down
	the call hierarchy, instead of saving it in a number register
	right away, as appears customary in this ms implementation.

	However, par@reset is called from a great number of places, and
	these usually set the indent registers beforehand.  I've left
	this as it is, so now two ways of setting the indents exist: via
	register and optionally via argument.

	* tmac/s.tmac (par@reset): Move font-size setting stuff before
	indent-setting stuff; set registers from optional arguments with
	default "n" scaling indicator before setting indents.
	(par*start, par@finish): Don't set registers, but instead pass
	arguments to par@reset.
	(@IP): Pass argument unevaluated to par*start.

	Fixes <https://savannah.gnu.org/bugs/?59604>.

2021-06-11  Tadziu Hoffmann <hoffmann@usm.uni-muenchen.de>

	* tmac/s.tmac (@QP, @XP): Be more scrupulous about using "u"
	scaling indicator.

2021-06-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #59604.

	* tmac/tests/s_IP-indents-using-paragraph-type-size.sh: Add it.
	* tmac/tmac.am (tmac_TEST): Run it.

2021-06-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	Refactor grog even more aggressively.  Make the tedious search
	for subs.pl unnecessary by inlining it into grog.pl directly.
	This makes the script stand alone and much more convenient to
	work with, and doesn't contribute to bloat, in my
	opinion--subs.pl was 10 times the size of grog.pl, and most of
	the code in the latter was dedicated to trying to locate
	subs.pl.

	* Makefile.am: Delete references to $(grog_dir).
	* configure.ac: Delete call of `GROFF_GROGDIR_DEFAULT` macro.
	* m4/groff.m4: Delete definition of same.
	* src/roff/grog/grog.am (GROG, dist_grog_DATA, grogdir): Drop
	variables.
	(grog): Remove target's dependency on `$(GROG)`.  Remove sed
	expression replacing `@grog_dir@` with `$(grog_dir)` in grog.pl.
	* src/roff/grog/grog.pl: Inline most of subs.pl (except for
	author/license comment banner).  Delete sub-hunting logic.
	* src/roff/grog/subs.pl: Delete.

2021-06-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/pic.ms (Basic PIC Concepts, Decorating Objects/Filled
	Objects, PIC Reference/Semi-Formal Grammar): Fix error: the
	keyword "solid" sets a line style, not a fill for a closed
	figure.  Thanks to Dave Kemper and Wim Stockman for reporting
	and researching this issue.

	Fixes <https://savannah.gnu.org/bugs/?60470>.

2021-06-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* NEWS:
	* doc/webpage.ms:
	* man/groff.7.man (Registers/Read-only registers) <.U>:
	* man/groff_diff.7.man (Language/New number registers) <.U>: Fix
	error; the sense of this Boolean variable was backwardly
	documented {perhaps due to an implementation detail from 2004
	that was reversed in commit 7a0e2f15, 26 February 2008}.

2021-06-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.cpp: Revise usage message.
	(synopsis): Set primary synopsis on a single output line, for
	convenience of parsing and also because we have no control over
	the width of the program name in character cells; it comes from
	argv[0] and is under user control.  There is thus no point in
	trying to get pretty formatting.  Also include separate synopsis
	lines for short and long help options.  Use opposite case from
	option flags for option arguments.
	(help): Collate option flags in English lexicographic order.
	Include space after flag letters for options that take
	arguments.  Consistently use capitals for option arguments
	because they are space-separated here.  Illustrate longer forms
	of -d and -r options.  Update language (some, like "tmac.name",
	was very old).  Add reference to groff(1) man page at end.
	(usage): Drop appendnment of notice regarding -h option; this is
	now covered in `synopsis()` unconditionally.

2021-06-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	Eliminate "groff_opts_no_arg.txt" and "groff_opts_with_arg.txt"
	files from distribution.  They are not needed by any live code
	in the tree; possibly only groffer ever used them.

	* src/roff/groff/groff.am (GROFF_OPTS_OUTPUT, groffoptsdir)
	(groffopts_DATA): Delete variables.
	(MOSTLYCLEANFILES): Stop adding to target.
	(groff_opts.tmp, groff_opts_no_arg.txt,
	groff_opts_with_arg.txt): Delete targets.

2021-06-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/grog/subs.pl (version): Report version information in
	a format consistent with our other programs.

2021-06-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/grog/grog.pl: Refactor initialization so that the
	program can be run from a build tree--and tested.  Drop much
	cruft from before Bertrand Garrigues's 2018 work to adopt
	`git-version-gen`.

2021-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_title-abbreviation-works.sh: Log more
	accurate messages in test failures.

2021-06-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-abbreviate-title): Add new internal macro
	to reduce the length of a man page title (i.e., the "ls" in
	"ls(1)", if it is too wide to fit in the page header (and would
	overwrite the center header material, usually the title of the
	manual section).  Since the beginning and end of the title might
	be important for disambiguation, truncation at either end would
	be unwise; replace the middle of the title with an ellipsis.
	Define new an-pageref and an-title-abbv strings for use by other
	macros and user-defined PT and BT traps.
	(PT, an-footer): Use new an-pageref string for economy.
	(an-header): Call an-abbreviate-title after setting the title
	length.

	* tmac/tests/an-old_title-abbreviation-works.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?43532>.

2021-06-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Copy mode): Add new section.

2021-06-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (else_request, while_request)
	(pipe_source, open_request, opena_request, pipe_output)
	(system_request): Update diagnostic messages to not presume the
	identities of the control or escape characters.

2021-06-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Conventions Used in This Manual): Add node.

2021-05-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.1.man: Expand to aid beginners.
	(initialization): Define `TeX` string.
	(Usage): Rewrite.
	(Usage/Getting started): Add "Hello, world!" example using
	multiple output devices (formats).
	(Usage/Using groff as a REPL): Add example of likely interest to
	programmers.  Or so I hope.  It illustrates the Turing
	fundamentals; we read, store, test, and branch.

2021-05-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/papersize.tmac: Improve diagnostic message; when
	complaining about unrecognized input, report back the input we
	actually received, not what it looks like after we transform it.
	Also add name of macro package to diagnostic so the user knows
	who is speaking, continuing the long process of fixing Savannah
	#52463.

2021-05-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_ms.7.man (Usage/Paragraphs) <QP>: Fix error: .QP
	paragraphs are indented by \n[QI], not \n[PI].

2021-05-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libdriver/input.cpp (do_file): Make fatal diagnostic
	from output driver when the device description file "DESC" can't
	be found more informative by including the name of the device
	for which the input was prepared.  Also makes malformed input of
	intermediate format more obvious.

2021-05-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/tbl.1.man (Miscellaneous): Add paragraph
	cautioning users against making tbl(1) tables conditional
	document content.

2021-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add style warnings for documents with input lines that
	are blank or have leading spaces, since they can cause
	surprising rendering; enabled if the CHECKSTYLE register is
	greater than 2.

	* tmac/an-old.tmac (an-blank-line-trap, an-leading-space-trap):
	Issue style warning if enabled (and only if fill mode enabled in
	leading space trap); in any event, recreate the default *roff
	behavior.
	(TH): Install traps.

	* doc/andoc.tmac (reload-doc): Remove man(7) traps before
	loading doc.tmac.

2021-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/andoc.tmac (reload-doc): Fix spurious blank line.

2021-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Operators in Conditionals):
	* man/groff.7.man (Control structures/Conditional expressions):
	Fix omission; the conditional operators "F", "m", and "S" also
	accept optional spaces and/or tabs between themselves and their
	arguments.

2021-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Requests/Request short reference) <.ta>:
	Describe the request as tersely as possible without omitting its
	essential syntax and semantics.  (The AT&T troff "+" relative
	prefix for normally absolute positions ".ta 1i +1i +1i" and
	alignment-specifying suffixes "L", "R", and "C" had both been
	omitted.)

2021-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Registers/Writable registers): Fix error:
	\n[nl] interpolates the current vertical position, not the
	vertical position of the "last printed text baseline"; the
	latter is \n[.h].

2021-05-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Filling and Adjustment): Update
	inter-sentence space example to be more illustrative.  Thanks to
	Dave Kemper and Doug McIlroy for the discussion.

	Fixes <https://savannah.gnu.org/bugs/?60404>.

2021-05-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common-u: Add comment warning source divers that
	\n[doc-header-space] is re-used for a purpose for which it is
	not documented.
	* tmac/mdoc/doc-nroff-u: Initialize doc-{header,footer}-space
	registers, which define the vertical spacing between body text
	and the relevant titles (not between the titles and the page
	margins) to 1v instead of 0.5i.  This is what mdoc(7) has always
	done in practice, per Ingo Schwarze.

2021-05-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grohtml/post-html.cpp (assert_state::add): Avoid
	potential deallocation of statically-allocated strings.  Use
	strsave() to duplicate them so that they can be safely handed to
	a_delete().  Also update diagnostic message to report name of
	complaining program (continuing the long process of fixing
	Savannah #52463).

	Fixes <https://savannah.gnu.org/bugs/?55693>.  Thanks to
	Petru-Florin Mihancea for the report.

2021-05-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/troffrc-end: Fix transposition error (in commit a248aa33
	on 15 January) that broke most table image generation in HTML
	output.

	Fixes <https://savannah.gnu.org/bugs/?60656>.

2021-05-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (UE, ME): Replace calls to HTML-NS macro for
	emissions of HTML 'A' tags with direct usage of \X device
	control escapes.  Replace .nop requests with text lines since
	this file is supposed to be maximally portable to other *roffs.

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (main): Call `scanArguments()`
	earlier, before trying to load a font description, so that -v,
	--version, and --help work.

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	[grohtml]: Add -C and -G options to postprocessor, to suppress
	output of CreationDate and Creator HTML comments, respectively.
	These can inject unwanted noise into build artifacts.

	* src/devices/grohtml/post-html.cpp: Add static globals
	`do_write_creator_comment` and `do_write_date_comment`.
	(html_printer::{do_file_components,~html_printer}): Write
	comments per corresponding global variables.
	(main): Add to `getopt_long()` call parameter and set as needed.
	(usage): Document them.

	* src/preproc/html/pre-html.cpp (scanArguments): Add to
	`getopt_long()` parameter, but ignore.

	* src/devices/grohtml/grohtml.1.man (Synopsis, Options):
	Document them.

	* src/roff/groff/tests/output_driver_C_and_G_options_work.sh:
	Test them.
	* tmac/tmac.am (groff_TESTS): Run test.

	Fixes 1/3rd of <https://savannah.gnu.org/bugs/?60655>.

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (usage):
	* src/devices/grohtml/post-html.cpp (usage): Fix inaccuracies in
	supported option summary.

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/html/pre-html.cpp (scanArguments):
	* src/devices/grohtml/post-html.cpp (main): Use libgroff's
	warning() instead of printf() to emit diagnostic about
	unrecognized parameter to `-x` option.  This sends the
	diagnostic to the standard error stream and continues the long
	process of fixing Savannah #52463.

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_www.7.man: Stop using the "www" macro package.  The
	macros it exposes are not part of the quasi-standardized man(7)
	language, and thus should not be used in man(7) documents.  See
	groff_man_style(7) for portability advice.  Besides, the
	extension macros in the permissively-licensed an-ext.tmac are
	sufficient to support URL and email hyperlinks, and our SH and
	SS macro implementations already support anchor placement
	without requiring explicit effort from page authors.
	(initialization): Stop sourcing www.tmac.  Stop calling .LK and
	.HR; the page-internal navigation links were being placed after
	the apropos line instead of at the beginning of the page,
	contradicting the comment that was there (possibly a bug).
	(Requests) <URL, LK>: Stop calling .TAG.
	<LK>: Drop paragraph advising reader to format page for groff's
	HTML output device to observe the navigation links at that point
	in the test.

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Comments): Fix error in description of parser
	operation; '.\"' is an effective whole-line comment not because
	it is a call of an undefined macro named '\"' (no 'mac' warning
	is emitted when that warning type is enabled), but because the
	comment escape is recognized normally and what remains is
	handled as the empty request.  Clarify that the optional
	argument to the .ig request is the name of a macro (which will
	be called normally _and_ end the ignored region; this is
	analogous to ".de foo bar").

2021-05-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (UR, UE, MT, ME): Rename environment and
	diversion for clarity; they apply to the link text, not the URL
	{or email address}.  The latter might not visibly appear,
	depending on the output driver.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Remove extraneous right-brace escape.

	Fixes <https://savannah.gnu.org/bugs/?60651>.  Thanks to Bjarni
	Ingi Gislason for catching it.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Copy Mode): Fix omissions from list of escape
	sequences interpreted even in copy mode.  Add \g, \V, "\.",
	'\"', \#, \a, \e and \E (with caveat), and \t.  Parallels
	groff(7) now.  Add cross reference to "Character Translations"
	node.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Escape Sequences): Fix omission; the escape
	character in an unrecognized escape sequence is not merely
	ignored; the sequence produces a warning diagnostic, albeit of a
	type that is disabled by default.
	(Escape Sequences/Escape short reference): Fix omissions; \# and
	\V are interpreted even in copy mode.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-header): Fix missing brace escape.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Slightly refactor footer spacing management when
	continuously rendering.

	* tmac/an-old.tmac (an-end): Increase the page length _after_
	flushing a pending output line.  Do so only by the amount of
	spacing we actually perform next.  Make the scaling indicator on
	the .sp request explicit.  The amount seemed magical because it
	was accounting for the one line to be consumed by output of the
	footer title line.  Instead, move that further increase of the
	page length from here...
	(an-footer): ...to here (~250 lines away), before calling BT.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common-u (doc-end-macro): When continuously
	rendering and after flushing the last line of the body text of a
	page, vertically space by 3 vees instead of 1, for consistency
	with our man(7) implementation.  Also increase page length by
	same amount _after_ flushing a pending output line, for symmetry
	with other spacing requests (and to prevent nasty surprises
	analogous to those in Savannah #60611).
	(doc-header): Put 3 vees of space after the header in continuous
	rendering mode, not 1 (and increase page length accordingly).

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Add warnings for macros deprecated in groff_man(7),
	emitted if the CHECKSTYLE register is greater than 1.

	* tmac/an-old.tmac (an-deprecation-warn): New macro emits
	diagnostic.
	(DT, PD): Call the foregoing, re-using arguments.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Refactor to move bodies of DT and PD into
	private macros.
	(an-reset-tab-stops, an-reset-paragraph-spacing): New names for
	the former DT and PT.
	(TH): Call these new macro names.
	(DT, PD): Wrap the corresponding private macros.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-bp): In continuous rendering mode, draw
	a horizontal line between a page footer of one man page document
	and the header of the next, but only if multiple documents are
	being rendered.
	(initialization): Use variable to ensure we don't draw this line
	after finishing the only document we render.

	Fixes other half of <https://savannah.gnu.org/bugs/?60611>.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix stochastic vertical space loss problems in continuous
	rendering mode by being more scrupulous about extending the page
	length.  As noted in Savannah #60611, sometimes the vertical
	space between a header line and the first section heading
	{"Name"} would be reduced or removed altogether, in a way that
	was highly sensitive to circumstances.  As far as I can tell,
	the problem is that this vertical space disappeared only when we
	were in double-secret probation no-space mode; this is the
	special non-spacing mode {not apparent with inspection of
	\n[.ns]} that happens when the stealth internal page location
	trap is sprung.  This trap does not appear in .ptr output but
	can be disabled with ".vpt 0", which is an alternative fix for
	this problem {because continuous rendering mode does not use
	vertical position traps at all}.  Another fix might have been to
	simply call the moral equivalent of ".pl MAXINT" as soon as
	continuous rendering mode was decided upon.

	* tmac/an-old.tmac (an-header): In continuous rendering mode,
	extend the page length by one line before calling PT to output
	the page header, and afterwards, extend the page length by 3
	vees and space by that amount (instead of half an inch).

	Fixes half of <https://savannah.gnu.org/bugs/?60611>.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-header, an-footer): Drop no-op .tl
	requests.

2021-05-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-footer): Improve symmetry with an-header.
	If rendering to HTML, don't bother setting the
	an-outer-footer-text, an-extra1, and an-extra2 strings to empty
	values; instead don't call BT, just as we don't call PT in
	an-header.

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-end): Drop needless .nr % assignment.
	Call our (wrapped) bp instead of the .pl request directly.
	(an-bp): Drop needless .br and (aliased) real .bp request.

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-footer): Refactor complex conditional.

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_X-register-works.sh: Add test for footer
	creeping into page content.

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (initialization): Ignore P and X rendering
	parameter registers if specified with continuous rendering
	enabled (the default in the nroff mode used for terminals), and
	emit diagnostic.

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_X-register-works.sh: Rewrite.  Increase test
	coverage and stop assuming that -rcR=1 and -rX=anything is a
	supported combination.  (Continuous rendering is supposed to
	suppress the printing of page numbers anyway.)

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (initialization): Refactor handling of P and
	X rendering parameter register validation in preparation for
	disabling them in continuous rendering mode, where they don't
	make any sense.

2021-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_TH-repairs-ad-damage.sh: Tweak test
	internals to make troubleshooting easier.

2021-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Relocate some initialization logic to
	be adjacent to (most of) the rest of it.

2021-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Remove useless .if.  Its condition is
	always true now in the wake of the fix for Savannah #60609.

2021-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Rename many package macros, strings, and
	registers (and the lone named environment) to be more expressive
	of their function.  "an-footer" is now the proper complement of
	"an-header" (setting up an environment and calling a
	user-redefinable trap macro).
	  an-first         -> an-is-first-page-of-document
	  an-html          -> an-is-output-html
	  an-footer        -> an-break-body-text
	  an-p-footer      -> an-footer
	  an-set-margin    -> an-reset-margin-and-inset-level
	  an-level         -> an-inset-level
	  an-tag-sep       -> an-tag-separation
	  an-no-space-flag -> an-need-no-space-mode
	  an-break-flag    -> an-need-break
	  an-div?          -> an-is-in-diversion
	  an-page-string   -> an-outer-footer-text
	  an-trap          -> an-input-trap
	  an-do-tag        -> an-write-paragraph-tag
	  an-1             -> an-env

	* tmac/andoc.tmac (reload-doc): ...as above for the exposed
	parts of the interface.
	  an-footer        -> an-break-body-text
	  an-p-footer      -> an-footer

2021-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Rearrange alternating font macros to be in
	alphabetical order (and the order documented in groff_man(7).

2021-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Refactor alternating font macros.  These
	macros are hard enough to understand without adding gratuitous
	structural differences to the reader's burden.  Make their
	implementations rigidly parallel.  Update comments.
	(RI, IR, IB, BI, RB, BR): Always define the `an-result` string
	as empty except for a dummy character '\&' for the sake of
	compatibility mode.
	(RI, IR, IB, BI): Defer interpolation of the first argument to
	the while loop if there are at least two (like the existing RB,
	BR).  This way the style name arguments to the font selection
	escape sequences in the appendment to `an-result` match the
	order of the letters in the macro name (useful to make sense of
	diffs).
	(RI, IR, IB, BI, RB, BR): Always remove the `an-result` string
	after interpolating it.
	(RB, BR): Only do work if there are any arguments.

2021-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Apply italic corrections more consistently.

	* tmac/an-old.tmac (BI, IB, IR, RI): Apply italic corrections
	more consistently.  Add lengthy comment rationalizing approach.
	(RI, BI): An italic correction is now applied after the last
	argument if it is of even parity (i.e., the 2nd, 4th, 6th, ...).

	* tmac/groff_man.7.man.in (Description/Font style macros): Note
	that italic corrections are applied.

	Fixes <https://savannah.gnu.org/bugs/?53541>.

	Thanks to Bjarni Ingi Gislason for the report and a suggested
	patch.

2021-05-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Ignore FT register when appropriate.

	* tmac/an-old.tmac (initialization): Validate user-specified
	value of \n[FT].  Continuous rendering ignores FT (page location
	traps are not used for footers in that mode).  Measuring a
	footer distance from the page top isn't done.  A footer distance
	of over half the page length is unlikely.  A footer distance of
	less than one line height is too.  Issue diagnostics in all of
	these cases.

	* tmac/tests/tmac/tests/\
	an-old_FT-bad-value-should-not-trash-titles.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?60612>.

2021-05-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Plant the an-footer trap (where we
	schedule a break in the page text prior to spacing down to the
	footer) at twice the value of \n[FT], not a hard-coded -1i.
	This way, the user can't make the an-p-footer trap (planted at
	\n[FT]) spring before the an-footer trap that should precede it.

	* tmac/groff_man.7.man.in (Options) <-rFT>: Document this.

2021-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_GHOSTSCRIPT_VERSION_CHECK): Add new
	autoconf macro to check Ghostscript version.  Versions 9.00 <= x
	< 9.54 suffer from a rendering glitch that affects the AT&T
	troff (and groff) special character \(lh; see
	<https://bugs.ghostscript.com/show_bug.cgi?id=703187>.  Store
	the result of the check.
	(GROFF_GHOSTSCRIPT_VERSION_NOTICE): Add new macro to report the
	problem detected by GROFF_GHOSTSCRIPT_VERSION_CHECK to the user.

	* configure.ac: Call the macros in appropriate places.

	Fixes <https://savannah.gnu.org/bugs/?59531>.

2021-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac (reload-man): Remove removal of RI macro, made
	unnecessary by commit 551f138 (15 May).

2021-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_HTML_PROGRAMS, GROFF_PDFDOC_PROGRAMS):
	Tweak autoconf warning messages when Ghostscript (gs) command
	missing to be more mutually congruent.
	(GROFF_URW_FONTS_CHECK): Tweak to note that gs is only run to
	locate the URW fonts if gs is available.

2021-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_AT-and-UC-footer-saved-and-restored.sh:
	Tweak to be more helpful when troubleshooting exasperating
	header/footer problems as in Savannah #60609.

2021-05-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Fix missing page footers when continuously rendering
	multiple documents.  Resolving this uncovered entangled header
	and footer management bugs with batch processing even when _not_
	continuously rendering.

	* tmac/an-old.tmac (an-start-new-document): New macro clears
	header trap so it doesn't get called with stale information.
	{The TH macro already replants a header trap with every man
	page if not continuously rendering.}  This macro also absorbs
	the break-page and page number incrementation logic from TH.
	(TH): Adapt semantics of "an-first" register to mean not "first
	page rendered" (apparently) but "first page of new document".
	If we are _not_ on the first page of a new document and the TH
	macro is called, we must be batch processing: force the previous
	man page to end (call an-end if continuously rendering, or
	an-start-new-document if not).  After all the header and footer
	strings have been configured for the man page, call an-header if
	we're on the first page of the document, not (just) if we're
	continuously rendering.  Zero an-first register at end of macro
	here unconditionally instead of conditionally in .an-header.
	(an-header): Drop conditional on continuous rendering.

	When I batch-render our 62 man pages to the terminal, I do note
	one cosmetic regression: the lj4_font(5) page, when continuously
	rendered in batch processing, has no space between its header
	line and first section heading ("Name").  Another cosmetic issue
	in this scenario is that the footers for every rendered page but
	the last, which had (wrongly) been absent entirely, are set with
	no space after them and the header of the next.

	* tmac/tests/an-old_page-footers-present.sh:
	* tmac/tests/an-old_page-header-has-current-data.sh: Add man
	page header/footer regression tests.
	* tmac/tmac.am (tmac_TESTS): Run the tests.

	Fixes <https://savannah.gnu.org/bugs/?60609>.

2021-05-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (initialization): Key the reprocessing guard
	{like a C language #include guard} on the existence of the TH
	macro instead of RI.  The latter seemed kind of random and TH
	is even more guaranteed to exist; it is the macro name most
	characteristic of the man(7) language and the andoc.tmac
	superstructure relies on it.  (TH may have been avoided because
	of its use with tbl(1); however, neither man(7) nor mdoc(7)
	support tbl's TH feature, and GNU tbl does not supply its own
	empty fallback definition as it does for TS and TE.  If we ever
	want TH-like functionality in future man pages, I suggest we
	pick a new, non-colliding name for it.)
	(initialization): Relocate load of devtag package; we don't
	need it before entering compatibility mode.  Move assignment of
	format of an-page-letter register from a "loose declaration"
	amid macro definitions to within existence test of X register.
	Stop initializing an-extra[123] strings outside of any macro;
	they need to be reinitialized at every TH call when batch
	rendering.
	(TH): Call DT in a less surprising place.
	(TH): Initialize all header/footer-related strings before
	calling header macros, even those not needed for the default
	header configuration.
	(TH): Add style warnings for underspecified arguments.
	(an-ne): Rename register from "an-need", which is pretty
	confusing in context, to "an-amount", since (1) a (vertical)
	amount is what it is, and (2) it's only used within this macro.
	Also due to factor (2), remove the register after using it.

2021-05-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* m4/groff.m4 (GROFF_URW_FONTS): Update configure script check
	for URW fonts to recognize recent releases of the URW Base 35
	fonts from Artifex Software.  Look for the AR (Arial roman
	equivalent) font under all of the names recognized by
	fonts/devpdf/Foundry.in.
	* m4/groff.m4 (GROFF_URW_FONTS_CHECK): Update wording of notice
	when URW fonts are not found.  Replace dead URL with working
	one.  Try to hedge against the future, but the Web is an
	ephemeral place, as are the file names Artifex gives to its
	fonts.  Thanks to T. Kurt Bond and Thomas Dupond for reporting
	and investigating the problem.

	Fixes <https://savannah.gnu.org/bugs/?60604>.

2021-05-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (ms Document Control Settings) <DI>:
	* doc/ms.ms (Document control settings, Displays and keeps)
	<DI>:
	* tmac/groff_ms.7.man (Document control settings, Displays and
	keeps) <DI>: Document this register; it had been mentioned only
	in passing.

2021-05-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (ms Document Control Settings) <DD>:
	* doc/ms.ms (Document control settings) <DD>:
	* tmac/groff_ms.7.man (Document control settings) <DD>: Fix
	error; changes to \n[DD] take effect at the next display
	boundary (including the end of the active one), not the next
	"paragraph" (paragraph macros cannot be called inside a display
	anyway).

2021-05-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac (reload-man): Delete no-op line that attempts
	to restore compatibility mode.  Individual pages have to do
	this, and ".do cp \n(.C" is not effective for the reason
	discussed in the 2020-04-16 ChangeLog entry.

2021-05-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (@RT): Delete definition; make it an alias for
	par@finish.  Until commit 021ba0e7 (1 May), they had identical
	definitions.  I find it difficult to imagine what use it would
	be to have an undocumented reset macro that resets everything
	_except_ the deeply internal \n[.ev]:ai.

2021-05-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: Handle HF strings with an embedded font family when
	applying italic-to-bold-italic remapping; the feature now works
	on troff devices as well.

	* tmac/an-old.tmac (initialization): Do more validity checking.
	Store heading family in new string \*[an-heading-family].  Clean
	up after self.
	(SH, SS): Include the heading family in the remapping target.

	* tmac/groff_man.7.man.in (Description/Document structure
	macros) <.SH, .SS>: Document it.

2021-05-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_char.7.man (Glyph tables/Mathematical symbols): Fix
	errors in special character descriptions; \[sqrt] is a "special"
	glyph (that is, it uses mathematical metrics on typesetter
	devices), and \[radicalex) is not (and is thus a "text" glyph).
	See Werner Lemberg's ChangeLog entry of 2003-01-05.  Problem
	dates to 07a6233ad, 27 May 2014.

	The overloaded use of the word "special" really pinches here.

2021-05-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tty.tmac: Replace fallback glyphs for radical extension
	and square root extension; use \[rn] instead, which works fine.

	Now the only glyph in the page that doesn't render on a UTF-8
	terminal (if one's font has adequate coverage) is the Bell
	System logo.

2021-05-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tty.char: Add fallback characters for \[fm] and \[sd].

2021-05-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	[man]: If \*[HF] is a bold style, substitute bold italics for
	italics in section and subsection headings, keeping the font
	weight consistent.

	* tmac/an-old.tmac (initialization): Set a flag for this based
	on the interpolation of \*[HF] matching "B" as its last
	character.
	(SH, SS): Apply and reverse font remapping based on this flag.

2021-05-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (EX): Work around Savannah #59522 by changing
	fonts differently on DVI output, avoiding a font warning.

2021-05-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac: If in nroff mode, remap font CBI to BI.
	* tmac/dvi.tmac: Remap font CBI to CWI.  (Computer Modern
	Constant Width has no bold styles.)

2021-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (NL, SM, LG): Issue warning diagnostic if macro
	called with arguments.
	(par*define-font-macro): Construct font macro with diagnostic to
	warn if called with excess arguments.
	(UL, BX): Issue warning diagnostic if macro called with excess
	arguments.

	Fixes <https://savannah.gnu.org/bugs/?60522>.

2021-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi: Delete redefinition of \putwordAppendix
	Texinfo macro.  This restores the word "Appendix" to the names
	of all appendices and fixes two bad internal links to Appendix
	E, the Register Index, in the DVI and PDF output formats.  Per
	consultation with Texinfo maintainer Gavin Smith, it's difficult
	to get the behavior we want, so give up trying for now.

2021-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (@MC): Actually diagnose and recover when user
	tries to .MC inside a diversion.

2021-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Differences from AT&T ms):
	* doc/ms.ms (Differences from AT&T ms):
	* tmac/groff_ms.7.man (Differences from AT&T ms): Document our
	different default (empty) for the center footer in nroff mode;
	this behavior appears to date back to June 1991 or earlier,
	drawing few complaints.

	Fixes <https://savannah.gnu.org/bugs/?59826>.

2021-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/*: Rename files to use consistent scheme; one
	underscore to separate the package name from the test objective,
	dashes to otherwise separate words.
	* tmac/tmac.am (tmac_TESTS): Use new names.

2021-05-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Restore support for AT&T ms PN register.

	* tmac/s.tmac (pg): Make register PN an alias of %.

	* doc/groff.texi (Differences from AT&T ms):
	* doc/ms.ms (Differences from AT&T ms):
	* tmac/groff_ms.7.man (Differences from troff ms): We don't need
	PN, and it was removed in commit 08291b40 (25 October 2020), but
	since it is documented in Lesk 1978 we're stuck with it.  Advise
	users to stick with %.  Also warn them of the hoop they must
	jump through if they redefine the page trap macro PT, which Lesk
	1978 also encourages.

	* tmac/tests/s_PN-works.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?59823>.

2021-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Restore default IP paragraph indentation after an SH call.

	* tmac/s.tmac (par@finish): Set "ai" register for the current
	environment to the paragraph indent (PI) setting for the current
	environment.

	* doc/groff.texi (Highlighting in ms) <IP>:
	* doc/ms.ms (Highlighting) <IP>:
	* tmac/groff_ms.7.man (Usage/Highlighting) <IP>: Update
	documentation.

	* tmac/tests/s_SH_resets_IP_indentation_amount: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?60222>.

2021-05-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (DS): Issue diagnostic and attempt recovery if
	document attempts to start a display within another display.

	Fixes <https://savannah.gnu.org/bugs/?55136>.

2021-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Implement alternative rendering for automatic
	footnote numbers in nroff mode, inspired by Heirloom Doctools
	ms; since superscripting is not universally available on
	terminals, surround number with square brackets instead.
	(fn@init): New macro finishes initializing footnote module,
	setting up aliases to par@sup-{start,end} strings in troff mode
	and otherwise defining fn@sup-{start,end} as brackets.  Define *
	string here, using new strings.
	(par): Call fn@init after par@sup-{start,end} are defined, and
	prior to other footnote integration material.
	(par*fp!0): Migrate from par@sup-{start,end} to
	fn@sup-{start,end}.

	* doc/groff.texi (ms Document Control Settings) <FF>:
	* doc/ms.ms (Footnotes) <FF>:
	* tmac/groff_ms.7.man (Usage/Footnotes) <FF>: Document it.

	Fixes <https://savannah.gnu.org/bugs/?60228>.

2021-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* test-groff.in: Stop passing the built groff executable -b and
	-ww options by default.  This reverses a change from 2017.  Dave
	Kemper has convincingly argued that there's no way to override
	-b and turn backtraces on warnings/errors back off, and that the
	built groff should behave as much like a "normal" one as
	possible.  The latter factor is of added importance now that we
	are using test-groff for generation of documents.

	* src/roff/groff/tests/regression_savannah_58153.sh: Adapt.

2021-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (BX): Add alternative implementation for terminal
	{nroff} devices.  Store width of boxed text, adding .4m only on
	troff devices (to make room for the vertical box lines).  Break
	long input line in troff implementation.  If not in troff mode,
	use ISO 6429 color escapes to render boxed text in black on
	white.  Use the \Z escape to match breaking semantics of macro
	in troff mode.

	* doc/groff.texi (Highlighting in ms) <BX>:
	* doc/ms.ms (Highlighting) <BX>:
	* tmac/groff_ms.7.man (Usage/Highlighting) <BX>: Document it.

	Fixes <https://savannah.gnu.org/bugs/?60477>.

2021-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am: Make $(PROCESSEDDOCFILES) depend on all the same
	targets as $(PROCESSEDEXAMPLEFILES); this way the me, ms, and
	pic.ms manuals are all regenerated upon changes to their
	underlying macro packages.

2021-04-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* INSTALL.extra: Update.
	(Evaluation): New section updates material on "test-groff"
	script.  Also tell people how to preview our Texinfo manual (in
	info, text, DVI, PDF, and HTML formats).
	(In Case of Trouble): New section updates bug reporting URL.

	Fixes <https://savannah.gnu.org/bugs/?57863>.

2021-04-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Make the FAM string work more sensibly; it now
	applies to headers, footers, and footnotes only if set
	before the first call of a sectioning, paragraphing, or
	{non-date} document description macro.
	(PT, BT): Set the font family to that saved for titles.
	(fn*do-FS): Set the font family to that saved for footnotes.
	(par@init): Copy the document font family to independent strings
	for titles and footnotes.
	(par@reset): If in a footnote environment, set the font family
	to that saved for footnotes; otherwise use \*[FAM].

	* tmac/groff_ms.7.man (Differences from troff ms/Text settings):
	Describe placement-dependent effect of FAM string setting.

	* doc/groff.texi (Highlighting in ms):
	* doc/ms.ms (Highlighting): As above, and suggest different
	occasions in which ".ds FAM C" and "CW" are convenient.

	Fixes <https://savannah.gnu.org/bugs/?60422>.

2021-04-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (source, source_quietly)
	(macro_source, macro_source_quietly): Use idiomatic Boolean
	literals.

2021-04-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi: Drop workarounds for Texinfo pre-5.0 versions;
	our local macros produced many warnings during generation of our
	Texinfo manual.
	(Langlemacro):
	(Ranglemacro):
	(Lparenmacro):
	(Rparenmacro):
	(Lbrackmacro):
	(Rbrackmacro): Delete.  Replace call sites with literals.
	(Lbracemacro):
	(Rbracemacro): Delete.  Replace call sites with @lbracechar{}
	and @rbracechar{}.
	(angles): Reimplement in terms of @guilsinglleft{} and
	@guilsinglright{}.  Flesh out comment.

	Fixes remainder of <https://savannah.gnu.org/bugs/?59524>.

2021-04-17  Dave Kemper <saint.snit@gmail.com>

	* doc/meintro.me:
	* doc/meref.me: Correct and make consistent usage of the term
	"point size".

	Fixes <https://savannah.gnu.org/bugs/?60403>.

2021-04-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (SS): Add devtags support.  Set a subsection
	title as a second-level heading and add it to a table of
	contents, if any.  Prompted by a query from Hans Unzner to the
	groff mailing list.  Thanks, Hans!

2021-04-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (SH): Fix apparent thinko.  Pass the devtags
	macro a literal "1" argument.  Passing it \n[an-level] wasn't
	correct (it stores the relative inset level, not a sectioning
	level), and was useless anyway: SH has already called
	.an-set-margin by this point, which resets \n[an-level] to 1.
	man(7) does not support nesting of SH macros.  Also call
	.DEVTAG-NH by its alias .DEVTAG-SH since section headings are
	not numbered in man(7).

2021-04-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tmac]: Adjust editor file encoding hints.

	* tmac/cs.tmac: Tell Vim the file is "iso-8859-2" (ISO Latin-2).
	* tmac/en.tmac: Stop telling Emacs the file is "latin-1"; it's
	ASCII.
	* tmac/fr.tmac: Tell Vim file is "iso-8859-15" (ISO Latin-9).

	Vim users may need to use ":e ++enc=iso-8859-2", for instance,
	to see correct glyphs.

2021-04-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	The first-order determinant of hyphenation points is language,
	not territory.  Use ISO 639 2-letter language codes for
	hyphenation and exception patterns instead of ISO 3166 2-letter
	territory codes.

	* tmac/*.us: Rename *.us files to *.en.
	* tmac/troffrc: Change hyphenation language "us" to "en".
	* tmac/en.tmac: Add English localization file.  Set hyphenation
	mode to 4.
	* tmac/troffrc: Derive groff locale from system.

	* doc/groff.texi (Manipulating Hyphenation):
	* man/groff.7.man (Hyphenation):
	* man/groff_diff.7.man (Implementation differences): Refer to
	"U.S. English" hyphenation patterns as simply "English"; they
	will be mostly correct for Commonwealth English as well, and no
	alternative English hyphenation patterns for other territories
	are available.

	* doc/groff.texi (Manipulating Hyphenation):
	* man/groff_diff.7.man (New requests): Note that default
	hyphenation mode depends on the language used on the system.
	Add concept index entry for localization.  Add file index
	entries for the locale macro files (cs.tmac, etc.).  Update to
	reflect rename of English hyphenation patterns and .hla
	identifier from "us" to "en".

	* src/roff/groff/tests/localization_works.sh: Add 10 test cases.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	* tmac/LOCALIZATION: Rewrite.

	Fixes <https://savannah.gnu.org/bugs/?59814>.

2021-04-12  Dave Kemper <saint.snit@gmail.com>

	* doc/meref.me: Correct various small issues.

	Fixes <https://savannah.gnu.org/bugs/?60379>.

2021-04-12  Dave Kemper <saint.snit@gmail.com>

	* man/groff.7.man (Registers/Writable registers) <year, yr>:
	Drop discussion of Y2K issues.

	Fixes <https://savannah.gnu.org/bugs/?60372>.

2021-04-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Setting Registers) <rnn>: Fix error: the
	request is not ignored if the second argument (the new name)
	does not exist.  Problem dates back to 52a6d12a (11 May 2000).

2021-04-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Implement new .soquiet and .msoquiet requests.

	Needed for two planned developments: {1} the i18n patch in
	Savannah #59814 can use this to quietly attempt to open a
	localization file.  groff only supports a few locales, so people
	with LANG=es_ES, for instance, would ordinarily see warning
	diagnostics on every groff startup; and {2} system- or
	site-configurable support of per-user {.,}troffrc or man.local
	files, gracefully failing if they don't exist.

	* src/roff/troff/input.cpp:
	(do_source): Add new function, taking boolean "quietly"
	parameter and absorbing function of source(), with added
	conditional.
	(source): Convert into a wrapper to call do_source() unquietly.
	(source_quietly): Wrap do_source(), quietly.
	(do_macro_source, macro_source, macro_source_quietly): Analogous
	to the foregoing.
	(init_requests): Hook "msoquiet" to macro_source_quietly() and
	"soquiet" to "source_quietly().

	* doc/groff.texi (I/O):
	* man/groff.7.man (Requests/Request short reference):
	* man/groff_diff.7.man (Language/New requests): Document them.

	* src/roff/groff/tests/msoquiet_works.sh:
	* src/roff/groff/tests/soquiet_works.sh: Test them.

	* src/roff/groff/groff.am (groff_TESTS): Add tests.

	Fixes <https://savannah.gnu.org/bugs/?59973>.

2021-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (ms Document Control Settings) <FF>: Update
	description to cover application of footnote format to footnote
	markers in general, not just numbers.  Clarify different
	behavior of format 1 with respect to automatic numbers and other
	markers.
	(ms Footnotes) <*>: Describe string operation in more detail.
	<FS>: Describe more precisely how the optional argument is
	handled.

	* doc/ms.ms (Footnotes): Synchronize with doc/groff.texi.  Add
	example using document's own text as a model.

	* tmac/groff_ms.7.man (Usage/Footnotes): Resync relevant
	portions with doc/ms.ms.

	Fixes <https://savannah.gnu.org/bugs/?60227>.

2021-04-06  Dave Kemper <saint.snit@gmail.com>

	* src/roff/nroff/nroff.sh: Recognize -k and -K options and pass
	them through to troff.  Document them in usage message.
	* src/roff/nroff/nroff.1.man: Document new -k and -K options.

	Fixes <https://savannah.gnu.org/bugs/?60349>.

2021-04-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Hyphenation):
	Recast introductory paragraph to better distinguish the
	automatic breaking of words and placement of hyphens at
	user-specified hyphenation points (done with the \% escape) and
	automatic determination of hyphenation points within words (what
	the pattern files and most of the hyphenation mode parameters
	are for).  Clarify that what our manual calls "automatic
	hyphenation" pertains only to the latter.
	<hw> Correct over-general claim; hyphenation exceptions defined
	with the .hw request _do_ honor .hy value 2 (don't break a word
	at the bottom of a page), but none of the others.
	<\%> Recast description of escape to emphasize independence of
	its two uses (e.g., "\%pseudo\%unununium" is hyphenated only
	after "pseudo-", if at all).
	<\:> Clarify that escape is an input word boundary.
	<shc> Clarify that the soft hyphen glyph is applied to manual as
	well as automatically-determined hyphenation points.
	<hy> Recharacterize as setting the _automatic_ hyphenation mode.
	Note that restrictions apart from value 2 are not applied to
	words with manually-assigned hyphenation points.
	<nh> Note that request affects only automatic hyphenation.

	* man/groff.7.man (Requests/Request short reference) <.hy,.nh>:
	Clarify that requests deal with _automatic_ hyphenation.
	(Registers/Read-only registers) <.hy>:
	Clarify that register applies to _automatic_ hyphenation.
	(Hyphenation): Add new introductory paragraph summarizing manual
	hyphenation support and features, including notice that breaking
	at explicit hyphens is performed in fill mode, i.e., even if
	_automatic_ hyphenation is disabled.

	Thanks to Peter Schaffter for the report.

	Fixes <https://savannah.gnu.org/bugs/?60332>.

2021-03-27  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Changes to the ghostscript fontnames (9.53.3).

	* font/devpdf/Foundry.in: HI and HBI switch to using
	Italic rather than Oblique.

2021-03-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Filling and Adjustment):
	* man/groff_diff.7.man (Language/Extended requests): Fix
	incorrect claim that additional inter-sentence space is applied
	only in fill mode.  Drop word "parameter" from description of
	unit used in .ss request arguments; it is a needlessly specific
	reference to the font file format.  Tighten wording.

	* man/groff.7.man (Control Characters): Fix incorrect claim that
	end-of-sentence detection is attempted only in fill mode.  Note
	that .ss request also affects inter-word spacing.

	* man/groff_diff.7.man (Language/Extended requests):
	  - Drop example.
	  - Move discussion of AT&T vs. GNU troff difference in .ss
	    handling from here...
	  (Implementation Differences): ...to here.

	Thanks to Dave Kemper for his continued scrutiny!

2021-03-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (ms Cover Page Macros):
	* doc/ms.ms (Cover page macros):
	* tmac/groff_ms.7.man (Usage/Cover page macros): Revise and
	rename (sub)sections to "Document description macros".

2021-03-15  Dave Kemper <saint.snit@gmail.com>

	* Makefile.am: Fix typos.  Thanks to Bjarni Ingi Gislason for
	the report.

	Fixes <https://savannah.gnu.org/bugs/?59457>.

2021-03-14  Dave Kemper <saint.snit@gmail.com>

	* man/groff_tmac.5.man: Correct erroneous reference to PSPIC
	where PDFPIC was intended.  Fix numerous smaller style and
	content problems.

	Fixes <https://savannah.gnu.org/bugs/?60229>.

2021-03-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Optional man extensions) <CW, EX, PN, Pn>:
	(Highlighting in ms) <CW>:
	(Additional ms macros) <CW>: Use "monospaced" to refer to font
	selected, retaining "constant-width" term only where it explains
	the macro mnemonic.  Thanks to Dave Kemper for pointing out the
	issue.  Also fix error: .CW in the ms package seems to have
	originated with Research Unix, not Berkeley.

	* doc/ms.ms (Highlighting) <CW>: Sync with our Texinfo manual.
	* tmac/groff_ms.7.man: Sync with ms.ms, omitting FAM advice.

	Fixes <https://savannah.gnu.org/bugs/?60037>.

2021-03-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Identifiers, Strings, Writing Macros)
	(Diversions): Improve cross-linkage of documentation regarding
	shared name space of macros, strings, diversions, and boxes.

	Fixes <https://savannah.gnu.org/bugs/?58995>.

2021-03-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Improve diagnostic messages.
	(@diag): New macro wraps .tm request, always prefixing it with
	the name of the macro package, as well as file and line
	indicators only if these are set to non-empty or non-zero
	values, respectively.
	(@error, @warning): Call @diag instead of .tm directly.
	(@fatal): Retire; it had only one call site and it would have
	greatly complicated @diag to support calling .ab instead of .tm.
	An ugly alternative would have been to call .ab with a redundant
	message after calling @diag.
	(@divert): New macro wraps .di request, remembering the name of
	the current file (\n[.F]) when a diversion is started.
	(@error-recover): Call .ab instead of (deleted) @fatal.
	(pg@super-eject): Tell user what the last file name seen was
	when recovering from an unfinished diversion when processing
	ends.

	Fixes <https://savannah.gnu.org/bugs/?55099>.

2021-02-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Fix bug where having line numbering off but the output line
	number register \n[ln] set to a positive value would cause
	tbl(1) table rows to spontaneously become numbered.  Use new
	\n[.nm] register to determine whether line numbering is enabled.

	* src/preproc/tbl/table.cpp (table::init_output, table::do_row)
	(table::do_bottom): Predicate all conditions on \n[ln]
	additionally on \n[.nm].

	Thanks to Olle Lögdahl for the report.  Problem appears to date
	back to commit b69062693d3360efce9d4d63fac337be21e07db7, 20 July
	2011.

	Fixes <https://savannah.gnu.org/bugs/?59812>.

2021-02-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #59812.

	* src/preproc/tbl/tests/cooperate-with-nm-request.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TEST): Run test.

2021-02-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Implement new read-only register ".nm".  It reports the
	enablement status of output line numbering (caused by the .nm
	request) irrespective of the temporary suspension of numbering
	with the .nn request.  Needed because there was no way to
	introspect its state, tbl(1) needs to do so, and the writable
	line number register \n[ln] is not a reliable proxy for it.

	* src/roff/troff/env.h: Add get_numbering_nodes(), returning
	`int`, to public interface of `environment` class.
	* src/roff/troff/env.cpp: Implement get_numbering_nodes().

	* src/roff/groff/tests/dot-nm_register_works.sh: Test it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	* doc/groff.texi (Miscellaneous):
	* man/groff_diff.7.man (Language/New number registers):
	* man/groff.7.man (Registers/Read-only registers): Document it.

	* NEWS: Add item.

2021-02-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Emit warning diagnostic when using a multi-page
	table with a repeating header (".TS H").
	(KS): Rename diversion from "kp*div" to "kp@div" since the name
	is now referenced outside the keep module.
	(KF): ...similarly for kp@fdiv.
	(generally): Update diversion dereference sites and derived
	names.
	(@TS): When handling "H" argument, check identity of current
	diversion and emit appropriately worded warning.

2021-02-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* FOR-RELEASE: Add more procedures and information related to
	incrementing groff's version number.

2021-02-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/searchpath.cpp (search_path::open_file)
	(search_path::open_file_cautious): Save errno before calling
	free() and restore it afterwards.  A future version of POSIX
	will require that free() not change errno if it succeeds[1];
	some C library implementations, including recent versions of
	glibc[2], lack this property.  free() is called in these
	libgroff functions to clean up after an unsuccessful fopen() of
	a heap-allocated file name string, and because the errno from
	fopen() may be passed to strerror() in a diagnostic message, it
	needs to be accurate.  I checked the rest of groff's codebase
	and found no other instances of free() being used to clean up
	after fopen() failure.

	[1] https://www.austingroupbugs.net/view.php?id=385
	[2] https://sourceware.org/bugzilla/attachment.cgi?id=13073

2021-02-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Address build failure on macOS.

	Follow the advice of the gnulib manual ("Changing your source
	for use with gnulib") more scrupulously; include config.h in
	more files.

	* src/libs/libgroff/curtime.cpp [HAVE_CONFIG_H]:
	* src/libs/libgroff/device.cpp [HAVE_CONFIG_H]:
	* src/libs/libgroff/fatal.cpp [HAVE_CONFIG_H]:
	* src/libs/libgroff/string.cpp [HAVE_CONFIG_H]:
	* src/libs/libgroff/strsave.cpp [HAVE_CONFIG_H]:
	* src/preproc/eqn/other.cpp [HAVE_CONFIG_H]:
	* src/preproc/eqn/text.cpp [HAVE_CONFIG_H]:
	* src/preproc/pic/object.cpp [HAVE_CONFIG_H]: Do it.

	* src/libs/libgroff/assert.cpp [HAVE_CONFIG_H]:
	* src/libs/libgroff/errarg.cpp [HAVE_CONFIG_H]:
	* src/libs/libgroff/error.cpp [HAVE_CONFIG_H]: #include
	config.h using angle brackets instead of quotation marks.

	Fixes <https://savannah.gnu.org/bugs/?60035>.

2021-02-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #60025.

	* tmac/tests/doc_Mt-works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2021-02-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Demote definition of \[yogh] special character escape from
	unconditional availability to be defined only if the output
	device defines it or if .AM macro is called to enable support
	for Berkeley-style accent marks.

	See
	  https://lists.gnu.org/archive/html/groff/2021-01/msg00000.html
	and follow-ups for discussion.

	* tmac/s.tmac (initialization): Move definition of \[yogh] (only
	if the output device doesn't already define it) from here...
	(AM): ...to here.

2021-02-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/ms.ms: Use \[ps] special character instead of local
	character definition using numeric code point escape, which is
	less portable.

	Fixes <https://savannah.gnu.org/bugs/?59528>.  Thanks to Bjarni
	Ingi Gislason for the report and a suggested patch.

2021-02-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (initialization): Call par*define-font-macro with
	arguments "CW" and "R" in nroff mode to silence font warnings
	from documents using .CW macro in nroff mode.

2021-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::init_output): Save value of
	hyphenation maximum consecutive line count register (\n[.hlm])
	more carefully to keep it from being incorrectly parsed as a
	decrement, because negative values of \n[.hlm] are valid (in
	fact, "-1" is the default).  In documents with a large number of
	tables, this can lead to a Persian chessboard problem and an
	integer overflow (at the groff language level, caught and
	handled by src/roff/troff/number.cpp:parse_term()).

	It is wise to wrap a non-literal second argument to the .nr
	request in parentheses if assignment is desired and its value
	can be negative.  See section 5.6.1 ("Setting Registers") of the
	groff Texinfo manual.

	Fixes <https://savannah.gnu.org/bugs/?59993>.

2021-02-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* test-groff.in: Add support for rfc1345.tmac.

2021-02-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	Integrate rfc1345.tmac into build system.

	* contrib/rfc1345/rfc1345.am: Do it.
	* Makefile.am: Include contrib/rfc1345/rfc1345.am.

2021-02-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (open_mac_file): Report problem when
	attempting to open macro files (-m arguments) and the error is
	something other than ENOENT.
	(process_macro_file): Update diagnostic to be more precise; the
	file couldn't be _opened_, not necessarily _found_, and clarify
	that the string being reported back to the user is the argument
	to the -m option, not a file name.
	(macro_source): Update diagnostic to report that the file
	couldn't be _opened_, not necessarily _found_, and include the
	nature of the problem.

2021-01-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	[tbl]: Save and restore hyphenation parameters.

	* src/preproc/tbl/table.cpp (table::init_output): When starting
	a table, save the hyphenation parameters (\n[.hy], \n[.hla],
	\n[.hlm], \n[.hym], \n[.hys]).  Restore them in the table reset
	macro (confusingly called "3init"), which is called before
	performing each diversion and before exiting a table.

	This enables people to, e.g., turn off hyphenation in a table
	text block with .nh, just as they can turn off adjustment with
	.na, without having to manually reset it.  The next text block,
	and the material after the table, will not be affected.

	Fixes <https://savannah.gnu.org/bugs/?59971>.

2021-01-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #59971.

	* src/preproc/tbl/tests/\
	save-and-restore-hyphenation-parameters.sh: Do it.
	* src/preproc/tbl/tbl.am (tbl_TEST): Run test.

2021-01-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am ($(TMACSTRIPFILES)):
	($(TMACMDOCSTRIPFILES)): Remove unidiomatic for loop which
	frustrated parallel make operation.

	Thanks to an anonymous contributor for the report and patch.

	Fixes <https://savannah.gnu.org/bugs/?59958>.

2021-01-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/ms.ms (Document control settings): Document old FAM string
	and new FR string.

2021-01-29  T. Kurt Bond <tkurtbond@gmail.com>

	[ms]: Add new string FR to hold an expression for computing the
	footnote length relative to the line length, consistently for
	single- and multi-column modes, which \n[FL] has never done.

	* tmac/s.tmac: Initialize FR string to "11/12".
	(@MC): Compute footnote column width using \*[FR] instead of a
	hard-coded "11/12" expression.
	(par@init): Compute default \n[FL] using \*[FR] instead of a
	hard-coded "11/12" expression.

	* doc/groff.texi (Macro Packages/ms/Document control settings):
	* tmac/groff_ms.7.man (Usage/Document control registers):
	Document it.

	Fixes <https://savannah.gnu.org/bugs/?59605>.

2021-01-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp: Add ADJUST_MAX enumeration constant to
	record maximum valid numerical adjustment mode.
	(adjust): Verify numeric argument against ADJUST_MAX instead of
	a numeric literal.  Ignore excessively large values instead of
	setting adjustment mode to "right".  Update warning diagnostic.

2021-01-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for .ad and .na requests.

	* src/roff/groff/tests/adjustment_works.sh: Do it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2021-01-24  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Filling and Adjustment):
	* man/groff.7 (Requests/Request short reference): Clarify
	behavior of ".na" and ".ad l".

	Thanks to Bjarni Ingi Gislason for pointing out the potential
	for confusion and for his careful review of the new text.

	Fixes <https://savannah.gnu.org/bugs/?59795>.

2021-01-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/grog/grog.pl: Report program name in fatal error
	diagnostics.  Also drop sentence-ending punctuation since Perl
	supplies additional information.

	Continues the long process of fixing Savannah #52463.

2021-01-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (RE): Style-warn if macro arguments are out
	of range or redundant.

	Fixes <https://savannah.gnu.org/bugs/?55320>.

2021-01-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	Improve style of troffrc{,-end} files.  Follow established
	idioms and make them consistent with each other.

	* tmac/troffrc:
	* tmac/troffrc-end:
	  - Identify files in header comments as part of GNU troff.

	* tmac/troffrc:
	  - Clarify purpose of .do request.
	  - Identify .X (set by groff -X) as a register, not a string.
	  - Remove temporary registers one per line to make
	    synchronization with foregoing logic easier.  Fixes name
	    space management nits: an undefined string troffrc!Xps was
	    being removed, and troffrc!{ascii,latin1,utf8,cp1047} were
	    not being removed despite being defined.

	* tmac/troffrc-end:
	  - Clarify that file is read after -m file arguments (not "all
	    macro sets", which can be loaded with .mso after this file
	    is processed).
	  - Advise usage of .do for groff extensions.
	  - Line-break one-off conditionals as troffrc does.
	  - Add empty string comment to empty string definitions.

2021-01-14  Dave Kemper <saint.snit@gmail.com>

	Commit 87edb525, from 2003, added character U+2026 (HORIZONTAL
	ELLIPSIS) to most base groff fonts, but there has been no
	kerning information for this character.  To produce consistent
	typography, it should be kerned the same way as the period,
	which is in 818 kern pairs across all the devps fonts.

	Apply the following shell command to the groff description files
	of the PostScript fonts.

	  for file in font/devps/*[A-Z]
	    do sed -Ei\~ 's/(.*)(^| )\. (.*)/&\n\1\2u2026 \3/' $file
	  done

	* font/devps/AB:
	* font/devps/ABI:
	* font/devps/AI:
	* font/devps/AR:
	* font/devps/BMB:
	* font/devps/BMBI:
	* font/devps/BMI:
	* font/devps/BMR:
	* font/devps/HB:
	* font/devps/HBI:
	* font/devps/HI:
	* font/devps/HNB:
	* font/devps/HNBI:
	* font/devps/HNI:
	* font/devps/HNR:
	* font/devps/HR:
	* font/devps/NB:
	* font/devps/NBI:
	* font/devps/NI:
	* font/devps/NR:
	* font/devps/PB:
	* font/devps/PBI:
	* font/devps/PI:
	* font/devps/PR:
	* font/devps/TB:
	* font/devps/TBI:
	* font/devps/TI:
	* font/devps/TR:
	* font/devps/ZCMI: Apply above script.

	Fixes <https://savannah.gnu.org/bugs/?58897>.  However, this
	will need to be done again if afmtodit is used to regenerate the
	above files, or afmtodit will need to be modified to add this
	kerning information itself.

2021-01-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/relocate.cpp (set_current_prefix) [_WIN32]:
	Move declaration of `pathextstr` to lie within preprocessor
	conditional, since it is dereferenced only there.

2021-01-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add support for strsignal().

	POSIX.1-2008 added strsignal() to the C library and recommended
	its use over sys_siglist[], but groff's pipeline management
	hadn't been updated in that respect since that time.

	* configure.ac: Check for strsignal().
	* src/roff/groff/pipeline.c (xstrsignal): Return strsignal() if
	it is defined.

	Thanks to an anonymous contributor for the report and the patch.

	Fixes <https://savannah.gnu.org/bugs/?59835>.

2021-01-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/libs/libgroff/relocate.cpp (relocatep): Add assertion to
	identify logic error if `curr_prefix` is unexpectedly a null
	pointer.
	(set_current_prefix) [_WIN32]: Allocate memory from heap for
	`curr_prefix` only on Windows; on other systems, this file's
	searchpath() is used to populate `curr_prefix`, and that
	function (except on Windows) performs its own allocation.  Fixes
	memory leak noted by Ingo Schwarze.
	(set_current_prefix) [!_WIN32]: Move logic attempting to set
	`curr_prefix` by calling searchpathext() from here...
	[WIN32]: ...to here.  The PATHEXT environment variable has
	semantics only under Windows, not POSIX systems, so the
	placement of this code seemed erroneous.

	See <https://savannah.gnu.org/bugs/?55475>.

2021-01-06  Colin Watson <cjwatson@debian.org>

	* contrib/glilypond/glilypond.pl:
	* contrib/gperl/gperl.pl:
	* contrib/gpinyin/gpinyin.pl:
	* tmac/hyphenex.pl: Avoid Perl's unsafe "<>" operator.

	The "<>" operator is implemented using the two-argument form of
	"open", which interprets magic such as pipe characters, allowing
	execution of arbitrary commands which is unlikely to be
	expected.  Perl >= 5.22 has a "<<>>" operator which avoids this,
	but also forbids the use of "-" to mean the standard input,
	which is a facility that the affected groff programs document.

	ARGV::readonly would probably also fix this, but I fundamentally
	dislike the approach of escaping data in preparation for a
	language facility to unescape it, especially when the required
	escaping is as non-obvious as it is here.  (For the same reason,
	I prefer to use subprocess invocation facilities that allow
	passing the argument list as a list rather than as a string to
	be interpreted by the shell.)  So I've abandoned this dubious
	convenience and changed the affected programs to iterate over
	command-line arguments manually using the three-argument form of
	open.

	glilypond doesn't need the initial unshift since that's already
	handled in contrib/glilypond/args.pl.

	Fixes <https://savannah.gnu.org/bugs/?55557>.

2021-01-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Set footnote line length in multi-column
	environments to 11/12ths of the text line length for consistency
	with earlier change to FL register default.

	Thanks to T. Kurt Bond for bringing this issue to my attention.

2021-01-04  John Gardner <gardnerjohng@gmail.com>

	* tmac/strip.sed: Escape '.' wildcard when matching lines using
	.as and .ds requests.

	Fixes <https://savannah.gnu.org/bugs/?59498>.

2021-01-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	Document use of SOURCE_DATE_EPOCH and TZ.

	The semantics of SOURCE_DATE_EPOCH to groff were not established
	with respect to time zone selection, prompting divergent
	interpretations; Debian and distributions derived from it have
	for several years patched groff to implicitly use UTC as the
	time zone when interpreting the current time (or
	SOURCE_DATE_EPOCH) as a local time.  While a convenient and
	defensible choice for reproducible build efforts[1], it runs
	against the grain of user expectations.  Systems programmers
	like monotonically increasing clocks; the broader user base
	usually prefers a clock that follows an applicable civil
	calendar.  To the latter audience, a difference between
	  $ date "+%Y-%M-%d %H:%m:%S"
	and
	  $ groff <<EOF
	  .af year 0000
	  .af mo 00
	  .af dy 00
	  .af hours 00
	  .af minutes 00
	  .af seconds 00
	  .tm \n[year]-\n[mo]-\n[dy] \n[hours]:\n[minutes]:\n[seconds]
	  EOF
	is difficult to explain.

	* doc/groff.texi (Environment):
	* src/devices/grohtml/grohtml.1.man (Environment):
	* src/devices/gropdf/gropdf.1.man (Environment):
	* src/devices/grops/grops.1.man (Environment):
	* src/roff/groff/groff.1.man (Environment):
	* src/roff/troff/troff.1.man (Environment): Expand description
	of use of SOURCE_DATE_EPOCH to note that it converts the time
	{as seconds since the Epoch} to local time, which motivates
	documentation of the TZ environment variable.  Explain what the
	time stamps are used for: troff merely stores the human-readable
	time components in registers; the grohtml, gropdf, and grops
	output drivers write the information to the output in comments.

	Fixes <https://savannah.gnu.org/bugs/?57218>.

	[1] https://reproducible-builds.org/docs/source-date-epoch/

2020-12-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/doc.am (.texi.dvi): Call texi2dvi with FORCE_SOURCE_DATE=1
	in the environment, avoiding an embedded timestamp in the
	generated groff.dvi file, which frustrated reproducible builds.
	Thanks to Werner Lemberg for the suggestion.

	* src/roff/groff/tests/string_case_xform_unicode_escape.sh: Fix
	test to no longer use Bash process substitution, resulting in
	nondeterministic file descriptor numbers appearing in test logs,
	frustrating reproducible builds.

	* contrib/pdfmark/pdfmark.am (PDFROFF): Call pdfroff without
	`--keep-temporary-files` option.  Temporary directories are
	created with mktemp(1) and files with an embedded process
	identifier, which frustrates reproducible builds.

	See <https://savannah.gnu.org/bugs/?57218>.

2020-12-21  Dorai Sitaram <ds26gte@yahoo.com>

	* tmac/s.tmac (@IP): Handle inter-sentence space correctly in
	paragraph tags by copying \n[.sss] from the enclosing
	environment to that used to format the paragraph tag.

	Fixes <https://savannah.gnu.org/bugs/?59742>.

2020-12-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #59742.

	* tmac/tests/s_IP_respects_inter-sentence_space_in_tags.sh: Do
	it.
	* tmac/tmac.am (tmac_TESTS): Run it.

2020-12-21  Bjarni Ingi Gislason <bjarniig@rhi.hi.is>

	* src/utils/addftinfo/addftinfo.cpp (usage): Use size_t for loop
	index when iterating over a count of size_t items.  Quiets
	signedness mismatch compiler warning.

	Fixes <https://savannah.gnu.org/bugs/?59583>.

2020-12-20  Colin Watson <cjwatson@debian.org>

	* src/devices/gropdf/gropdf.pl:
	* src/utils/afmtodit/afmtodit.pl: Sort Perl hash keys.  Hash
	iteration order may differ between runs, which makes builds
	harder to reproduce.  Sort hash keys in gropdf and afmtodit
	output to avoid this.

2020-12-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/ms.ms (Basic Information): Tweak unit definitions.  groff
	defines a typesetter's point as precisely 1/72 inches.  Also use
	the correct symbol for inch units--strictly, it's the same as
	that for "seconds" as in subdivisions of the degree, and not a
	typographical quote of any sort.

	Fixes <https://savannah.gnu.org/bugs/?59463>.

2020-12-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	[ms]: Set footnote line length to AT&T default.

	groff ms has since its initial implementation used a default
	footnote line length of 5/6ths of the text line length; this may
	correspond to an early AT&T ms default (perhaps documented in
	the 1974 version of the M. E. Lesk paper, "Typing Documents on
	the UNIX System"[1]).  However, as early as V6 Unix (1975), AT&T
	ms actually used a footnote line length of 11/12ths of the text
	line length instead[2].

	Heirloom Doctools and neatroff ms also use this default.

	* tmac/s.tmac: Set default footnote line length to 11/12ths of
	the text line length.

	* doc/groff.texi (ms Document Control Settings):
	* doc/ms.ms (Document control registers): Document new default.

	[1] https://www.troff.org/using-ms.pdf
	[2] https://minnie.tuhs.org/cgi-bin/utree.pl?file=V6/usr/lib/tmac.s

2020-12-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Lower new unplanted trap error to 'mac' warning.

	* src/roff/troff/div.cpp (top_level_diversion::change_trap):
	Change error upon invalid attempt to move an unplanted trap into
	a warning of type 'mac'.

	* doc/groff.texi (Warnings):
	* src/roff/troff/troff.1.man (Warnings): Recast description of
	'mac' warning type to include the above scenario.

	Thanks to Bjarni Ingi Gislason for reporting the diagnostic
	arising in real life, and to Peter Schaffter for the discussion
	and recommendation.  Some bike sheds get painted quickly!

	Fixes <https://savannah.gnu.org/bugs/?59573>.

2020-12-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_mdoc.7.man: Tweak mandatory macro explanations.

	Update descriptions and template of .Dd, .Dt, .Os usage to
	reflect recent changes and recommended conventions.

	Thanks to Ingo Schwarze, Colin Watson, and Alan D. Salewski for
	the discussion, and Florent Rougon and Robert Bihlmeyer (many
	years ago) for the original report.

	Fixes <https://bugs.debian.org/284002>.

2020-12-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/xtotroff/xtotroff.c (MapFont): Avoid writing past
	the end of a static buffer.  Problem found and patch supplied by
	Bjarni Ingi Gislason.  I tweaked it to comment it differently
	{in case the buffer ever needs to grow, but the prospects of
	future X11 server-side font rendering development seem dim} and
	use snprintf() instead of retaining the existing sprintf().

	Fixes <https://savannah.gnu.org/bugs/?55257>.

2020-12-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/xtotroff/xtotroff.c (CanonicalizeFontName)
	(FontNamesAmbiguous, MapFont, main): Format diagnostic messages
	more consistently with GNU Coding Standards.  Prefix with name
	of complaining command.  Put argument literals in quotation
	marks.  Put each message on one line only.

2020-11-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Parameters): Fix error in example.  Arguments
	to .als were in the wrong order (.als is not ln(1)).  Also mark
	output to the standard error stream using the @error Texinfo
	command instead of @result.

	Thanks to Dorai Sitaram for finding this error.

	Fixes <https://savannah.gnu.org/bugs/?59566>.

2020-11-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Debugging): Update with a more helpful
	introduction, summarizing available procedures.  Mention
	backtracing since it is much more useful now (post-groff
	1.22.4.)

	* man/groff.7 (Debugging): Add new section summarizing
	material added to our Texinfo manual.

	* man/groff_diff.7.man (Debugging): Add new section describing
	groff extensions.

2020-11-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Traps): Update.  Organize subsubsections "Page
	Location Traps" and "Diversion Traps" under new subsection node
	"Vertical Position Traps" to make the conceptual organization
	more clear.  Define and discuss trap visibility earlier.
	Document unit used for page location trap reporting.  Introduce
	analogy of .wh and .ch requests as queue operations.  Document
	what happens when the same macro is planted as a trap in
	multiple locations; supply example.  Supply example of .itc
	usage.  Consistently refer to an end-of-input macro as such, to
	contrast it with the "end macro" that can be used with, e.g.,
	.de and .ig requests.

	* man/groff.7 (Traps): Add new section summarizing
	language feature.

2020-11-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common-u (doc-footer): When performing
	double-sided page layout, set page number on outside of _recto_
	{odd-numbered} pages, as is conventional and for consistency
	with man(7).

	* tmac/groff_mdoc.7.man
	(Formatting with groff, troff, and nroff): Document what
	double-sided layout (not "printing") means.  Also correct
	description of continuous rendering, which implied that page
	headers and footers were not written at all, and used an
	incorrect groff driver name.

	Fixes <https://bugs.debian.org/919890>.  Also see:
	https://lists.gnu.org/archive/html/groff/2019-01/msg00021.html
	Thanks to Ralph Corderoy for the discussion.

	* tmac/tests/doc-D_places_page_numbers_correctly.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2020-11-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common-u (doc-header): Fix infinite loop when
	attempting to trim header string (like "FTP(1)") to fit when the
	available title length won't allow even extreme shortening.
	Measure the string before and after calling .substring on it,
	and break out of loop if it didn't get shorter.

	Problem dates back to at least
	ed63b0ae76a611b581601a1afc192f6a7367be6f (7 July 2002), possibly
	as far as the Great Mdoc Rewrite of
	058f72af832fc68488d33cd09ec819e5c560fa09 (23 March 2001).

	One can never check loop invariants too many times...

	Fixes <https://bugs.debian.org/411227>.

	* tmac/tests/\
	doc-do_not_loop_infinitely_when_shortening_headers.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

2020-11-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh: Recognize -b and -z options and pass
	them through to troff.  Document them in usage message.
	* src/roff/nroff/nroff.1.man: Document new -b and -z options.

2020-11-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/div.cpp (top_level_diversion::change_trap):
	Emit error diagnostic if an attempt is made to move an unplanted
	macro.  This could have been a warning, as it's pretty harmless
	{though possibly a big surprise to anyone who was wondering why
	their .ch was a no-op}, but there's no good warning category for
	this kind of problem and I am not about to start a bike shed
	discussion about it right now.

2020-11-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi: Update.  Add introductory material.  Rewrite
	the first section of the "gtroff Reference" chapter of our
	Texinfo manual.  It is written as an introduction for readers
	who want to go straight to "raw" troff without knowing much or
	anything about existing macro packages.  Thanks to Dave Kemper
	and John Gardner for feedback and support.

	Clarify whitespace usage.  "Whitespace" is defined in this
	manual as "spaces, tabs, and newlines".  Say only "spaces and
	tabs" when newlines should not be included.

	Rename "Font Files" to "Device and Font Files".

	Rename "Manipulating Filling and Adjusting" to "Manipulating
	Filling and Adjustment".

	Update discussion of "copy mode".  Rename from "copy-in mode",
	which I don't think eludicdated anything; is there a "copy-out
	mode"?  Rename nodes accordingly.  Attempt to explain more
	clearly.  Recast to shift emphasis to what _isn't_ merely copied
	in copy mode, since that is what seems to cause confusion among
	the inexperienced.

	Update "Conditionals and Loops".  Add introductory paragraph.
	Add nodes/subsections "if-then" and "Conditional Blocks".  Add
	subsection "Conditional Blocks" to explain the behavior of the
	\{ and \} escapes much more precisely.  I don't think this
	syntactical area is well understood.  Supply examples.

2020-11-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add style checks to man(7) macro package.

	Not otherwise documented yet; experimental--subject to change.

	* tmac/an-old.tmac: Initialize CHECKSTYLE to false if not
	already set.
	(an-style-warn): New macro emits diagnostic of type "style" when
	called if CHECKSTYLE register is true.
	(TH): Call an-style-warn if fewer than two or more than five
	arguments are seen.
	(RI, IR, IB, BI, RB, BR): Call an-style-warn if fewer than two
	arguments are seen.

2020-11-11  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	Update copyright.

	* update-copyright.sh: use gnulib's 'update-copyright' script.
	Pass this script in directories 'arch', 'contrib', 'font',
	'man', 'tmac', 'src' and on a list of extra files.

	* FOR-RELEASE: mention this point.

2020-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/preconv.1.man (Description): Fix error:
	groff's -K option, not -k, specifies a character econding (and
	overrides GROFF_ENCODING in the environment).  Also explain how
	valid encoding strings are determined.

	Thanks to Bjarni Ingi Gislason for the report.

	Fixes <https://savannah.gnu.org/bugs/?59445>.

2020-11-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::compute_separation_factor):
	Add word "table" to diagnostic message to better cue the user
	that it is produced by roff that has been injected into the
	document by the tbl(1) preprocessor.  The other 3 such possible
	diagnostic messages already do this.  Thanks to Bjarni Ingi
	Gislason for bringing the inconsistency to light.

	Fixes <https://savannah.gnu.org/bugs/?59443>.

2020-11-07  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_mdoc.7.man (Predefined strings): Ensure the table
	fits even on ASCII and Latin-1 terminals.  Thanks to Bjarni Ingi
	Gislason for the report.

	Fixes <https://savannah.gnu.org/bugs/?59424>.

2020-11-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_mdoc.7.man (General text domain/Enclosure and
	Quoting Macros): Fix errors in macro descriptions.
	<.Dq>: Encloses its arguments in directional double quotes where
	available.
	<.Eq>: Misrendered example; say "XstringY" rather than
	"XXstring".
	<.Sq>: Encloses its arguments in directional single quotes where
	available.

2020-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add support for CS and CT registers to mdoc(7), just like in
	man(7), from a year ago.

	* tmac/doc.tmac-u (doc-print-recursive): Call .stringup on each
	argument if register doc-do-capitalize is true.
	* tmac/mdoc/doc-common-u (Dt): Call .stringup on
	doc-document-title if \n[CT] is true.
	(Sh): Set doc-do-capitalize to value of \n[CS].  Set
	doc-do-capitalize false before returning.
	* tmac/mdoc/doc-ditroff-u:
	* tmac/mdoc/doc-nroff-u: Set CS and CT registers to 0 (false)
	if the user has not defined them.

	* tmac/groff_mdoc.7.man \
	(Formatting with groff, troff, and nroff): Document it.

	* tmac/tests/doc-CS_works.sh:
	* tmac/tests/doc-CT_works.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run tests.

2020-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_overstrike, do_bracket)
	(do_name_test, do_expr_test, do_zero_width, do_width)
	(do_special, do_if_request, read_color_draw_node): Improve
	diagnostic messages for missing closing delimiters by describing
	the incomplete structure and the problem token.
	(read_rgb, read_cmy, read_cmyk, read_gray): Improve English
	syntax of diagnostic message when color definition missing.

2020-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-ditroff-u:
	* tmac/mdoc/doc-nroff-u: Recognize but ignore the groff_man(7)
	string HF and registers FT, IN, P, SN, and X (by initializing
	them empty or zero if they are not set).  This reserves them so
	that they don't become used for divergent purposes.  man(1)
	programs set these and other parameters already handled (like
	LL) to configure page rendering, and it would break the
	macro-package agnosticism afforded by andoc.tmac to expose
	different externally-programmable registers and strings.
	* tmac/groff_mdoc.7.man \
	(Formatting with groff, troff, and nroff): Document this.

2020-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Implement \*< and \*> strings for subscripting.
	groff ms has had (extension) strings for superscripting since
	1991 at the latest, and the asymmetry possessed me of a madness.
	Both pairs of string names follow similar usage in Eric Allman's
	"me" macros.

	* NEWS:
	* doc/groff.texi:
	* tmac/groff_ms.7.man: Document it.

2020-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_mdoc.7.man (Predefined strings): Fix error: the
	\*[Lq] and \*[Rq] strings degrade to neutral double quotes (")
	on "nroff" devices (-Tascii and -Tlatin1), not "``" and "''".

2020-10-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac (ds*end!0): Improve diagnostic to mention .RD.

2020-10-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/s.tmac: Revise diagnostic messages.  Define a common
	prefix string, starting all such messages with "s.tmac".
	Continues the long process of fixing Savannah #52463.  Drop the
	word "macro" from diagnostic since this will now be clear from
	the prefix.  Prefix every macro name in a diagnostic message
	with a leading dot; this was already done in four cases.
	(cov*first-page-init): Use temporary string to avoid multi-line
	diagnostic message.
	(@NH): Use temporary string to prevent overlength line.

	A further benefit of this revision is that index information
	produced by ms's .IX macro (which writes to the standard error
	stream) will now be trivially easy to extract even for documents
	that cause diagnostic messages.  One can simply filter them with
		grep -v '^s\.tmac:'
	or similar.

2020-10-28  Ingo Schwarze <schwarze@openbsd.org>

	* man/roff.7.man, tmac/groff_man.7.man.in: Correct man(7)
	history.

2020-10-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	Fix ms .R macro to work as documented, by handling its arguments
	instead of ignoring them.

	* tmac/s.tmac (R): Delete.  During set up, call
	par*define-font-macro for R font just as we do for B, I, and BI.

	Problem dates back at least to groff 1.02, June 1991.

	* tmac/tests/s_R-handles-its-arguments.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?59348>.

2020-10-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Fix ms .TC macro by allowing it to actually use lowercase Roman
	numerals for the page(s) of the table of contents when a custom
	title (header or footer) is defined containing '%'.

	As a side effect, eliminate the PN register, which was
	apparently misused because it was undocumented and had a name
	just long enough to be both suggestive and ambiguous.  Another
	pin goes into my Ken Thompson voodoo doll.

	* tmac/s.tmac (IX): Write out page number of index term(s) using
	the % register (instead of PN), obtaining whatever format is
	assigned to the register at that time.
	(CH): Similarly, output %, not PN, in the center of the default
	heading.
	(PT): Save the format of %, set it to decimal, copy its value to
	a new register, pg*page-number-in-decimal, then restore %'s
	previous format.  Compare the new register, not %, to 1 to
	determine whether special page one behavior should be used.
	(pg*end-page): Assign pg*next-format to %, not PN.
	(XA): Define toc*num with the interpolation of %, not PN.

	* tmac/tests/s_TC-works-with-percent-in-custom-titles.sh: Test.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Problem appears to be very old; as I read it, Larry Kollar was
	complaining of it in his ms.ms document over 20 years ago.

	Fixes <https://savannah.gnu.org/bugs/?59345>.

2020-10-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7 (Requests/Request short reference) <.af>: Fix
	error; "l" is not a valid register format.  Explain what the
	request does, and the default format, as tersely as possible.

2020-10-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	Use only `malloc()` and `free()` to manage memory of paths
	opened by the parser instead of mixing in C++ new/delete
	management under some runtime-dependent circumstances.

	* src/libs/libgroff/relocate.cpp (relocatep): Use `malloc()`,
	not new.
	* src/roff/troff/input.cpp (process_macro_file)
	(process_startup_file, macro_source): Use `free()`, not
	`{a_,}delete()`.

	Thanks to an anonymous contributor for the report and patch.

	Fixes <https://savannah.gnu.org/bugs/?56694>.

2020-10-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_char.7.man (Description/Special character escape
	forms): Clarify discussion of Unicode Normalization Form D and
	its applicability to code points acceptable in Unicode numeric
	special character escapes.  Also document that these escapes
	must use uppercase hexadecimal digits.

	Attempts once again to slay the unkillable beast that is
	<https://savannah.gnu.org/bugs/?57618>.

2020-10-21  Ingo Schwarze <schwarze@openbsd.org>

	On systems without NAME_MAX, use FILENAME_MAX as a last resort.

	Problem reported by Eli Zaretskii <eliz at gnu dot org>
	on MS Windows in https://savannah.gnu.org/bugs/?55449

2020-10-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (environment::possibly_break_line):
	Emit break warning and return if the output width is not
	positive.  The code assumes that it will be and loops infinitely
	if it isn't.  I _think_ this is because we're not able to get
	width data for (some?) CJK glyphs.  Based on a patch by Osamu
	Sayama.

	* src/roff/groff/tests/\
	do_not_loop_infinitely_when_breaking_cjk.sh: Test it.
	* src/roff/groff/groff.am: Run test.

	Fixes <https://savannah.gnu.org/bugs/?44018>.

2020-10-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::init_output): Save the value
	of \n[.tabs] when starting a table.  In the reset macro, restore
	the saved value.

	Based on a patch by Bjarni Ingi Gislason (tweaked to use a more
	normative preprocessor symbol; "REG"s aren't "NAME"s).

	* src/preproc/tbl/tests/save-and-restore-tab-stops.sh: Test it.
	* src/preproc/tbl/tbl.am (tbl_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?42978>.

2020-10-20  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/nroff/nroff.sh: Recognize -E option and pass it
	through to troff.  Document it in usage message.
	* src/roff/nroff/nroff.1.man: Document new -E option.

	Based on a patch by Ingo Schwarze.

	Fixes <https://savannah.gnu.org/bugs/?44289>.

2020-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Stop remapping ` and '.  Our own pages now
	appear to be clear of wrong-quote problems, so let's make them
	visible if they recur.  Those who don't want to fix bad man
	pages (distributors, site admins) can restore the mappings in
	their man.local files.

2020-10-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-warn): New; emits warning diagnostic.
	(R): Use new macro instead of .tm* requests directly.

2020-10-18  Ingo Schwarze <schwarze@openbsd.org>

	#include "config.h" before <stdio.h>

	Required with e.g. gcc 4.2.1 because gnulib/lib/stdio.in.h
	uses the "restrict" keyword since this gnulib commit:
	commit 182afcba2635cbff91240656c7fb3742dd23ab6f
	Author: Bruno Haible <bruno@clisp.org>
	Date: Sat Feb 22 20:57:30 2020 +0100

	Otherwise, the build may die from the declaration of
	various printf-like functions with messages like:
	./lib/stdio.h:851: error: expected ',' or '...' before 'fp'

	* src/libs/libgroff/assert.cpp, src/libs/libgroff/errarg.cpp,
	src/libs/libgroff/error.cpp, src/preproc/eqn/eqn.ypp:
	#include "config.h".

2020-10-18  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	hpftodit: incorrect 'delete' after new[]

	* src/utils/hpftodit/hpftodit.cpp (output_font_name): use
	'delete[]'.

	Fixes bug #55331. Found by David Binderman, fixed by Ingo
	Schwarze.

2020-10-18  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	preconv: don't use libuchardet if input is stdin

	* src/preproc/preconv/preconv.cpp (do_file): don't call
	detect_file_encoding if input file is "-"

	This fixes the failure on MS-Windows described #55334, however
	this does not fix the encoding detection with uchardet if the
	input is stdin (the user would have to pass with -D the correct
	encoding as explained in the man page).

2020-10-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/lex.cpp (troff_defs): Set the "..." token on
	the baseline, not vertically centered, aligning the actual
	behavior with what our eqn(1) man page has claimed since 2007.

	Fixes <https://savannah.gnu.org/bugs/?59285>.

2020-10-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grops/grops.1.man
	(Usage/TrueType and other font formats): Remove dead URL to
	ttftot42 utility.  Update URL to fontforge tool.  Replace much
	of the discussion with an example, motivated by Jordan Torbiak's
	"groff-install-font" script on GitHub Gist, of how to add the
	Roboto Slab Regular font to a user-local groff font directory
	{and how to test it, too}.

	Fixes <https://savannah.gnu.org/bugs/?58077>.

2020-10-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Report program name in warning
	diagnostics.

	Continues the long process of fixing Savannah #52463.

2020-10-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Add fallback for lq, rq strings.

	Define \*(lq and \*(rq as '"' if the output device has no \(lq
	or \(rq special character escapes defined (respectively).

	This is a bit belt-and-suspenders for groff since our output
	devices all guarantee availability of these glyphs, but if this
	macro file gets used with other implementations (and if they
	support the 'c' conditional), it should prevent the strings from
	producing empty output.

	Man page writers should simply use \(lq and \(rq unless they are
	aiming for pathological levels of portability (e.g., composing
	man pages today for consumption on simulators of 1980s Unix
	systems).

2020-10-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Define an-end with .de1.  We need to define
	an-end with de1 (execute macro with compatibility mode off)
	because, as of 37b4180a27a6eeaea429e40ec278abefcda7f3a7 (11
	October), it can now be called from a trap executing in a
	context whence compatibility mode might be on (namely,
	"reload-doc" in andoc.tmac).

2020-10-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/eqn/main.cpp (main):
	* src/preproc/pic/main.cpp (main):
	* src/preproc/tbl/main.cpp (main):
	* tmac/eqnrc:
	* tmac/troffrc: Perform checks of register and macro definitions
	with a .do request, since we might be in compatibility mode.

2020-10-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (do_if_request): Emit warning of type
	"syntax" if a groff conditional expression extension is used
	when compatibility mode is active.

	* doc/groff.texi:
	* src/roff/troff/troff.1.man: Update description of "syntax"
	warning type to be more general.  It was inaccurate, referring
	only to "dubious syntax in numeric expressions", which was not
	the case.  Instead it was being used only for poor construction
	of character classes with the .class request.

2020-10-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (main): Stop ignoring -T.  GNU tbl
	was undocumentedly ignoring the -T option; apparently IRIX tbl
	implemented it, something on the system called tbl with that
	option (I'm guessing IRIX's man(1)) and its users spammed James
	Clark with bug reports.  We can probably weather the volume of
	such spurious reports from IRIX users today.

2020-10-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/main.cpp (main): Clarify fatal diagnostic in
	generated document by informing the user that the program is
	aborting, and also that it is groff extensions that are required
	rather than GNU troff per se (since Heirloom Doctools troff
	claims groff extension support via the .g register).

2020-10-14  Ingo Schwarze <schwarze@openbsd.org>

	In groff(1), fix the combination of -v with -k, -j, and -J.

	* src/roff/groff/groff.cpp: Pass the -v option through to the
	preconv, chem, and ideal preprocessors, just like for all
	other preprocessors, to print the version of the preprocessor
	and to avoid garbage output.

	Bugfix patch from Eli Zaretskii <eliz at gnu dot org>
	submitted in: https://savannah.gnu.org/bugs/?55297

2020-10-12  Bertrand Garrigues <bertrand.garrigues@laposte.net>

	Update 'gnulib' submodule.

	* gnulib: now points on d60a35e94c4f5b8f09f15828242418f5073d46e7
	from 'gnulib' repository.

	* configure.ac: minimum autoconf version is now 2.64 due to
	gnulib upgrade.

	* FOR-RELEASE: add the gnulib update to the checklist.

2020-10-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac: When switching between macro packages in
	andoc and using continuous-rendering mode, flush any partially
	collected output line and write page footer.
	(reload-doc): Call an-end if it is defined.
	(reload-man): Call doc-end-macro if it is defined.
	* tmac/tests/andoc-flush-between-packages.sh: Add regression
	test.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?59106>.

2020-10-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac: Remove traps set by mdoc package by the names
	they actually use.
	* tmac/tests/andoc-clear-doc-traps.sh: Add regression test.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Fixes <https://savannah.gnu.org/bugs/?59246>.

2020-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::init_output): In the release
	macro written to the output, reword the warning diagnostic that
	is emitted when a table row is to be output without enough room
	before the next page location trap.  The former wording said
	that a "text block" would not fit on the page, and that is
	normally how table rows grow longer than one line in the first
	place.  However, there are other ways the conditional can be
	satisfied, as witnessed in Savannah #57665, so simply say what
	is known; that the table _row_ overruns the space to the next
	trap (we say the row won't "fit on [the] page").

	Fixes <https://savannah.gnu.org/bugs/?59233>.

2020-10-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp
	(double_line_entry::double_line_entry):
	(double_line_entry::simple_print): Remove garbage lines
	inadvertently added in previous commit.

2020-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Stop tbl from injecting spurious blank lines (and emitting
	spurious warnings about tables and "text blocks" not "fitting on
	a page") into long tables in man pages when continuous rendering
	is used (the default for nroff output devices).

	* src/preproc/tbl/table.cpp (USE_KEEPS_REG): New preprocessor
	symbol stores name of groff register for dynamic determination
	of keep usage.
	(table::init_output): If the NOKEEP flag is not set, then in
	generated groff output, see if the usekeeps register is defined;
	if not, define it and enable usage of keeps.
	(table::do_row): In groff output, check usekeeps register before
	calling keep and release macros.
	(table::do_bottom): In groff output, check usekeeps register
	before calling release macro.

	* tmac/an-old.tmac (TS): Set the usekeeps register used by tbl
	to the logical complement of the man(7) cR (continuous
	rendering) register.

	* tmac/tests/an-old_TS_do_not_keep_tables_when_cR_set.sh: Add
	regression test.
	* tmac/tmac.am (tmac_TESTS): Run test.

	Problem appears to date back to the introduction of continuous
	rendering in groff 1.17 (3 May 2001).

	Fixes <https://savannah.gnu.org/bugs/?57665>.

2020-10-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (simple_entry::position_vertically):
	(block_entry::position_vertically):
	(table::determine_row_type):
	(printfs): Update assertions to indicate what actually went
	wrong.

2020-10-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/node.cpp: Make diagnostics slightly more
	informative in unusual error cases.
	(real_output_file::~real_output_file): If ferror() reports error
	status on a stream say that, instead of "error writing".  If it
	does not, but fflush() fails on the stream, describe the flush
	as failing, and use strerror() since fflush() sets errno.  If
	pclose() fails, say that we were unable to close a pipe instead
	of repeating the name of the C library function to the user, who
	might not be a C programmer.  Report strerror() in this case and
	for a failing fclose().
	(real_output_file::flush): Repeat updated fflush() logic from
	previous function.

2020-09-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (register setup): Make interaction of \n[C]
	register and HTML output more clear in code and comments.

2020-09-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/regression_savannah_59202.sh: Reduce test
	case.

2020-09-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	Fix SEGV arising from recursing destructor.

	* src/roff/troff/node.h (output_file): Add class member
	`is_dying` to track whether destructor has already been entered;
	initialize false.
	* src/roff/troff/node.cpp (real_output_file::~real_output_file):
	Set `is_dying` true when destructor entered.
	* src/roff/troff/div.cpp (cleanup_and_exit): Only delete
	`the_output` object if it is not already being destroyed.
	* src/roff/groff/tests/regression_savannah_59202.sh: Add test.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	Thanks to "hackerb9" for reporting the problem.  Problem appears
	to date back to groff 1.02 (June 1991) or earlier.

	Fixes <https://savannah.gnu.org/bugs/?59202>.

2020-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (register setup): Condition decisions on
	\n[an-html] rather than a string comparison using \*[.T]; that
	is what the register is there for.

2020-09-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/andoc.tmac: Save alias to .ne request.
	(reload-doc): Restore .ne request, which an-old.tmac meddles
	with if continuous rendering is used.  (The meddling ultimately
	dates back to 777e2d262862621966c18d685a000cc88f432bc6, 26
	January 2002, which simply redefined .ne as empty on nroff
	devices.)

2020-09-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	Ship tests in distribution archive.

	* src/preproc/preconv/preconv.am (EXTRA_DIST):
	* src/roff/groff/groff.am (EXTRA_DIST):
	* src/roff/nroff/nroff.am (EXTRA_DIST):
	* tmac/tmac.am (EXTRA_DIST): Add
	$({preconv,groff,nroff,tmac}_TESTS), as appropriate.

	* src/roff/nroff/nroff.am (MOSTLYCLEANFILES): Stop adding
	$(nroff_TESTS), which can only have unhappy consequences.

2020-09-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am: Fix problem with recently-relocated mdoc macro
	files not ending up in the right place in the distribution
	archive.
	(dist_tmac_DATA): Also include $(TMACUNSTRIPFILES).
	(TMACMDOCSTRIPFILES): Rename from $(TMACMDOCFILES).  Update
	interpolation sites.
	(TMACMDOCUNSTRIPFILES): New variable holds mdoc macro files in
	the tmac/mdoc subdirectory.  Stop adding these files to
	$(TMACUNSTRIPFILES) since those reside in tmac/ directly.
	(EXTRA_DIST): Add $(TMACMDOCUNSTRIPFILES).
	($(TMACSTRIPFILES)): Depend only on $(TMACUNSTRIPFILES).
	($(TMACMDOCSTRIPFILES)): Add new rule, much like the foregoing.
	Depend on $(TMACMDOCUNSTRIPFILES) and copy files into tmac/mdoc.
	(dist-hook, tmac-dist-hook): Remove; they no longer do any
	distinct work.

	Fixes <https://savannah.gnu.org/bugs/?59186>.

2020-09-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/tbl/table.cpp (table::init_output):
	(table::compute_expand_width):
	(table::compute_separation_factor): Use consistent format for
	diagnostic messages.
	  - Do not spread a single diagnostic across multiple lines.
	  - Report messages in GNU Coding Standards format, that is:
	  - Report the name of the file the problem is in...
	  - ...then the line number...
	  - ...then the diagnostic severity level...
	  - ...then the specific problem.

2020-09-26  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Emit warnings when configuration registers
	are ignored when producing output for HTML.

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (an-p-footer): Define \*[an-page-string] if
	(1) the output device is not HTML; (2) \n[X] has been defined;
	and (3) the page number has not yet reached the threshold
	defined by \n[X].

	Fixes <https://savannah.gnu.org/bugs/?59179>.

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for Savannah #59179.

	* tmac/tests/an-old_X_register_works.sh: Do it.
	* tmac/tmac.am (tmac_TESTS): Run it.

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac:
	* tmac/doc.tmac-u: Emit more informative fatal diagnostic when
	installed version of groff is too old.  Report the version found
	and explicitly note consequent abort.

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am: Regenerate stripped macro files upon changes to
	any of their unstripped counterparts.  This is crude, but they
	weren't being regenerated at _all_.  Defeating a central
	function of Make is bad.
	(TMACUNSTRIPFILES): New variable.  Populate with -u files.
	($(TMACMDOCFILES) $(TMACSTRIPFILES)): Depend on
	$(TMACUNSTRIPFILES).

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac:
	* tmac/andoc.tmac:
	* tmac/doc.tmac-u:
	* tmac/s.tmac: Clarify fatal diagnostics by informing the user
	that the program is aborting.

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/www.tmac.in: Revise diagnostic message handling.
	(www:fatal): New macro handles fatal macro usage errors.
	(www:lenstr): Use www:fatal instead of writing to standard error
	with .tm (rather than www:error) and then calling .ab without
	arguments, which produces an unsightly "User Abort." message.
	(www:lenstr):
	(www:splitstr):
	(www:url_breaks):
	(www:url_breaks_split):
	(LINKSTYLE): Report expected number of arguments in diagnostics.
	(www:fontstyle): Shorten diagnostic message.

2020-09-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/div.cpp
	(top_level_diversion::clear_diversion_trap): Fix copy and paste
	error in diagnostic, which wrongly reported that a top-level
	diversion trap couldn't be "set" when "clear"ed was meant.

2020-09-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/grn/main.cpp (conv):
	* src/roff/troff/node.cpp (suppress_node::tprint): Remove
	embedded newlines from diagnostic messages.

2020-09-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Move setup of remaining rendering option
	parameters (registers C, D, P, and X) to end of file.

2020-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Move setup of rendering parameter
	registers IN and SN from here to the end of the file.  Update
	comments.

2020-09-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Drop \*[an-empty] string.  This string is
	documented as preventing "looping" (presumably infinitely) if
	someone calls a two-font macro with an inconvenient parameter;
	the example shown is ".RB ( \\ )".  This string was being
	interpolated at the end of each argument pair to the two-font
	macros BI, BR, IB, RB, and RI.  This code dates back to groff
	1.10 (dc5351364982f78f8c630f1e856d692d4a82666f, 26 November
	1995).  Did you notice a two-font macro missing?  It was: IR.
	Using it with the proscribed input fails to cause a problem; the
	others similarly operate just fine when the empty string
	interpolation is removed.  Presumably at some point in the past
	25 years, this workaround became unnecessary.
	(BI, BR, IB, RB, RI): Remove interpolations of string.

	* tmac/tests/an-old_avoid_two-font_denial_of_service.sh: Add
	regression test.
	* tmac/tmac.am (tmac_TESTS): Run test.

2020-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Refactor continuous rendering handling.
	Relocate set up of \n[cR] to end of file in parallel with other
	rendering parameter management.  Instead of conditionally
	defining the an-ne and an-bp macros, define them
	unconditionally.  Also define them with .de instead of .de1,
	since they will only be called within the contexts of macros
	that are already running with compatibility mode off (i.e., the
	public interface macros).  Relocate definition of an-end to sit
	alongside these other continuous-rendering-mode specific macros
	and avoid a forward reference and scattering of \n[cR]
	conditionals around the file.
	(an-set-up-continuous-rendering): Define new macro to move
	macros (and end macro) into place.  Call it at the end of the
	file only if cR eventually winds up being true.

2020-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Improve name space management.  Rename .ne
	request to .an-ne instead of outright clobbering it (and in
	parallel with .an-bp).  Rename 'an-ne' register to 'an-need' to
	prevent confusion with renamed request.

2020-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Drop .ll hack for LL register.

	Drop the .ll hack for setting the line length on nroff devices.

	Once upon a time, the only way to get man pages to render on a
	terminal at any width other than the nroff default of 65n was to
	put an .ll request into the page--a mortal sin against
	portability--or your man(1) program could sneak such a request
	into nroff's input stream.

	Also, long ago, John Eaton of UT Austin wrote a man(1) program.
	In a few years this implementation branched into two lines of
	development, which I'll call man-db man (Wilford/Polacco/Watson)
	and another, Brouwer/Lucifredi man, which as of this writing saw
	its last release in 2011 (1.6g).

	The man and mdoc macros of groff 1.18 (July 2002) introduced an
	LL register to configure the line length, respecting an -rLL
	command-line option.  The source change was made by Werner
	Lemberg on 3 May 2002 and Colin Watson updated man-db man(1)--on
	the same day!--to synthesize the option when calling groff.

	Later, in August 2005, Keith Marshall, a user of version 1.5m of
	Brouwer/Lucifredi man(1), which did not set the LL register,
	suggested that the existing .ll setting (technically, the value
	of \n[.l], the only way the result of an .ll request could be
	introspected) be honored in the absence of the LL register.
	However, it is impossible to distinguish a user-supplied ".ll
	65n" request from nroff's default setting, which was in that
	case overridden to the modern default of 78n.

	And so, in what is now git commit
	f9d5df4aebd3d834b4084ffefa52a115e00dce38 (1 September 2005), it
	was done.

	This led to (1) surprising behavior for users accustomed to old
	methods and desirous of the nroff default and (2) lengthy
	apologia in groff source code comments and the groff_man(7) man
	page.

	Ironically, Brouwer/Lucifredi man(1) had already added support
	for the LL register by the time of its 1.6 release two months
	earlier (20 June 2005).  (Curiously, it did so similarly to the
	old .ll hack, by injecting an '.nr LL' request into groff's
	input stream, rather than using the -r command-line option.)
	Moreover, Marshall and the groff list were already aware of
	this, but the change was accepted anyway because version 1.6
	was "too new"!  (Distributions are slow sometimes, true...)

	Let us survey the field in 2020.  man-db man(1) has supported
	the LL register for eighteen years, and Brouwer/Lucifredi man(1)
	for fifteen.  Heirloom Doctools's man macros set the line length
	to 78n on nroff devices unconditionally.  mandoc(1) similarly
	also always formats for 78 columns on terminals.  groff's
	mdoc(7) macros grew support for LL in parallel with man(7) in
	2002 and never added the \n[.l] introspection at all.

	There no longer seems to be any reason to preserve this hack.

	* tmac/an-old.tmac (initialization): Drop complex setup of LL
	register.
	(TH): Relocate line length reset; no behavior change.
	(after .mso man.local): Initialize LL only if the user hasn't;
	use device default in troff mode, and 78n in nroff mode.

	* tmac/groff_man.7.man.in (Options) <-rLL>: Stop documenting .ll
	hack.

	Fixes <https://savannah.gnu.org/bugs/?58992>.

2020-09-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_LL_init_sanely.sh: Add test.
	* tmac/tmac.am (tmac_TESTS): Run test.

2020-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/xditview/GXditview.ad: Widen the default geometry
	to accommodate the width of a page rendered using the X100-12
	device.  Display devices these days have much greater horizontal
	resolution than they did 20 years ago.

2020-09-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Use correct point size default for
	X{75,100}-12 devices.

2020-09-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/mdoc/doc-common-u (doc-prepare-section-heading): New
	macro defines new string doc-sec-head to enable recognition of
	mixed-case section headings in mdoc man pages.  For example,
	"Name" and "Description" are now recognized in addition to
	"NAME" and "DESCRIPTION".
	(doc-section-{name,synopsis,library,description,see-also,files,
	authors}): Redefine strings to be mixed-case.  Add trailing
	comment guard per recommended best practice.
	(Sh): Call doc-prepare-section-heading instead of
	doc-first-parameter, and compare predefined section strings to
	doc-sec-head instead of doc-str-dfp.

	* tmac/tests/doc-accept-mixed-case-section-headings.sh: Test it.
	* tmac/tmac.am (tmac_TESTS): Run test.
	* tmac/tests/doc-smoke-test.sh: Use mixed-case section headings.

2020-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* makevarescape.sed: Use \[] form of special character escapes.

	The only man page we have that doesn't turn compatibility mode
	off (neqn) also doesn't use any sed-substituted patterns where
	characters replaced by a \[] special character escape form are
	likely to be used.

	The @g@ command prefix is the main avenue for intrusion of such
	escapes, but I think it improbable that many people are going to
	include apostrophes, double quotes, carets, grave accents, or
	tildes in the command prefix; some or all of these will pick
	fights with the shell and require quoting that we don't
	represent in man page text anyway.

	On top of that, neqn is largely a stub page.

	If it's a problem, a better fix than reverting this is to make
	neqn switch out of compatibility mode like our other man pages.

2020-09-03  G. Branden Robinson <g.branden.robinson@gmail.com>

	* FOR-RELEASE: Start a release checklist.  We probably should
	have done the afmtodit.tables update for 1.22.4.  There were no
	AGL changes and the Unicode decomposition changes were limited
	to additions for Balinese (11), CJK compatibility ideographs
	(5), and 13 code points outside the Basic Multilingual Plane.

2020-09-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.tables: Regenerate using Unicode
	13.0.0.

2020-09-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	make-afmtodit-tables: Automate AGL reassignments.

	Automate the procedure done manually in
	b72b91e85e80a69304e6569db535bcca0e0ecab5 (9 April 2007), so that
	it doesn't regress when we regenerate afmtodit.tables.

	* src/utils/afmtodit/make-afmtodit-tables: Do it.
	* src/utils/afmtodit/afmtodit.tables: Regenerate it.

2020-09-02  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/groff.1.man (Options) <-E>:
	* src/roff/troff/troff.1.man (Options) <-E>: Document that -E
	implies -Ww.

	Fixes <https://savannah.gnu.org/bugs/?59030>.

2020-09-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_char.7.man: Revise glyph descriptions.

	Fixes <https://savannah.gnu.org/bugs/?59031>.

2020-09-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tty.tmac: Define fallback glyphs for Bell System logo
	{non-breaking adjustable space} and radical extension and square
	root extension (both dummy characters '\&') to suppress warnings
	from groff_char(7).  As none of these are encoded in Unicode it
	seems unlikely they will become supported soon.

2020-08-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/troff.1.man (Options) <-I>: The current working
	directory is searched _last_, not first, unless the order is
	altered with "-I .".

	* src/roff/groff/groff.1.man (Options) <-I>: Rearrange
	description.

2020-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Update mdoc package to honor HY register as man does now, per
	suggestion from Colin Watson.  Recognize but ignore AD string
	for man package compatibility (essentially "reserving" it),
	though mdoc intentionally does not permit configuration of
	adjustment.

	* tmac/mdoc/doc-ditroff-u:
	* tmac/mdoc/doc-nroff-u: Do it.

	* tmac/mdoc/doc-common-u: Initialize \n[doc-hyphen-flags] from
	\n[HY].

	* tmac/groff_mdoc.7.man \
	(FORMATTING WITH GROFF, TROFF, AND NROFF): Document it.

2020-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Reset inter-word and inter-sentence
	spacing to default with each new page rendered.

	{To observe the problem prior to this change,
	  $ groff -mandoc groff_mmse.7 $any_other_man_page
	groff_mmse(7) loads sv.tmac, which changes the sentence
	spacing.}

2020-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* PROBLEMS: Undocument the problem with test-groff and mdoc.
	It's resolved.

	Fixes <https://savannah.gnu.org/bugs/?51073>.

2020-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am (NORMALFILES, MDOCFILES): Drop unused variables.
	($(TMACMDOCFILES) $(TMACSTRIPFILES)): Scrub trailing whitespace.
	Wrap long line.

2020-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	mdoc: Relocate within build tree.

	The (modern) mdoc macro package has not been usable within the
	build tree, unlike the others.  This makes it more troublesome
	to test changes, and frustrates deploying our test
	infrastructure against it.  Re-arrange the build tree to
	resemble an installation tree closely enough for the macro
	package to load.

	* tmac/doc-common-u:
	* tmac/doc-ditroff-u:
	* tmac/doc-nroff-u:
	* tmac/doc-syms-u: Rename to...
	* tmac/mdoc/doc-common-u:
	* tmac/mdoc/doc-ditroff-u:
	* tmac/mdoc/doc-nroff-u:
	* tmac/mdoc/doc-syms-u: ...these.

	* tmac/tmac.am (TMACMDOCFILES): Look for files in tmac/mdoc.
	($(TMACMDOCFILES)): Create tmac/mdoc in build tree.

	Fixes <https://savannah.gnu.org/bugs/?51003>.

2020-08-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test for usable in-tree mdoc.

	* tmac/tests/doc-smoke-test.sh: Add test.
	* tmac/tmac.am (tmac_TESTS): Run test.

2020-08-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_TH_repairs_ad_damage.sh:
	* tmac/tests/an-old_TH_repairs_hy_damage.sh: Add tests.
	* tmac/tmac.am (tmac_TESTS): Run tests.

2020-08-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Set hyphenation mode to user preference
	with each new page rendered, in case a hostile page meddled with
	'.hy' or '.nh'.
	(after .mso man.local): Relocate setting of default hyphenation
	mode here (instead of just before .mso man.local).  Eliminate
	conditional on \n[an-html]; this doesn't matter because
	grohtml(1) doesn't support hyphenation anyway.  If it does learn
	to hyphenate, we should treat it the same as other output
	devices in any case.  Add comment explaining why we fall back to
	different defaults depending on \n[cR].

2020-08-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (TH): Set adjustment to user preference with
	each new page rendered, in case a hostile page meddled with
	'.ad' or '.na'.
	(after .mso man.local): Set the default adjustment mode only if
	a -d option or man.local did not.  Also do the same for the HF
	string; relocate its definition here and make it similarly
	conditional.  Also update comment on setting of CS and CT
	registers and style their conditionals consistently with the
	rest of the package.

	* tmac/groff_man.7.man.in (Strings) <\*(AD>: Document it.
	(Strings) <\*(HF>: Parallelize language with new \*(AD.
	(Options) Expand introductory sentence to discuss -d and -r
	options.
	(Options) <-dAD>: Document default and likely values.  Nobody
	right-justifies or centers man page text; send the curious to
	groff(7) for '.ad' request documentation.
	(Options) <-dHF>: Document default and steer people to groff(7)
	for '.ft' request documentation.

2020-08-21  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac (set-an-margin): Rename...
	(an-set-margin): ...to this.  It was the only package-internal
	register, macro, string, or diversion that wasn't named using
	the "an-*" schema.
	(TH, SH, SS): Update call sites.

2020-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (.ME, .UE): Restore hyphenation after
	"punctuation" arguments have been output.  The next token will
	always be a space node, the end of the document, or similar.

	* tmac/tmac.am (tmac_XFAIL_TESTS): Mark the punctuation
	hyphenation tests as expected to fail, because they now do.

2020-08-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/ps.tmac: Define ordinary hyphen-minus as fallback
	character for U+2011 (non-breaking hyphen).  Prompted by
	discussion with Dave Kemper in Savannah #58390.

2020-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	Fix hyphenation bug.  The UR/UE and MT/ME macros were much too
	aggressive about turning hyphenation off.  Disable it only when
	writing the actual URL or email address.

	* tmac/an-ext.tmac (.MT, .UR): Stop disabling hyphenation here.
	(.ME, .UE): Disable hyphenation right before output of
	URL/address; restore it right before output of supplementary
	arguments ("punctuation").

	* tmac/tests/an-ext_ME_punct_hyphenates.sh:
	* tmac/tests/an-ext_MT_body_hyphenates.sh:
	* tmac/tests/an-ext_UE_punct_hyphenates.sh:
	* tmac/tests/an-ext_UR_body_hyphenates.sh: Test behavior.

	* tmac/tmac.am (tmac_TESTS): Run tests.

2020-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	Adapt to the fact that \: reënables hyphenation.  Rename
	"hyphenless [discretionary] break" to "non-printing break point"
	in documentation.

	* doc/groff.texi (Manipulating Hyphenation): Rename "hyphenless
	break" to "non-printing break point".  Clarify that it is the
	soft hyphen glyph, not necessarily a hyphen, that is ordinarily
	written to the output on hyphenation breaks.  Note that the
	remainder of a word after \: is subject to hyphenation as
	normal.  Note (new) '\:\%' idiom for getting what people will
	want at least some of the time.  Update example to use it.
	* makevarescape.sed: Insert \% after we insert \: to rewrite
	slashes in filenames, to protect later portions of the filename
	from hyphenation.
	* man/groff.7.man (Escape Sequences/Escape short reference):
	Rename "hyphenless break" to "non-printing break point".
	* man/groff_diff.7.man (Language/Escape sequences): Resync with
	our Texinfo manual.
	* tmac/groff_man.7.man.in (Description/Hyperlink and email
	macros): Rename "hyphenless break" to "non-printing break
	point".

2020-08-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	documentation: Re-christen 'ESCAPE_AMPERSAND'.

	s/zero[- ]width space character/non-printing input break/

	* doc/groff.texi (Requests): Rename.  Update conceptual index
	entries; retain old name (with an appended "[sic]") to aid
	readers accustomed to it.
	(Ligatures and kerning): Update conceptual index entries.
	Supply context ("effect on kerning").
	(Drawing requests): Update conceptual index entries.  Supply
	context ("effect on '\l'").
	* man/groff.7.man (Description): Rename in macro-advice-writing
	shorthand.
	(Escape Sequences/Escape short reference): Rename.
	* tmac/groff_man.7.man.in (Description/Command synopsis macros
	[style]: Rename.
	(Description/Portability) [style]: Rename.
	* tmac/groff_mdoc.7.man (TROFF IDIOSYNCRASIES/Macro Usage):
	Rename.
	(TROFF IDIOSYNCRASIES/Other Possible Pitfalls): Rename.

2020-08-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man.in (Description/{Document structure
	macros <.TH>, Horizontal and vertical spacing}): Fix erroneous
	use of "flush left".  The current uses were introduced by me,
	but the page has borne incorrect uses of it as far back as 1999
	{in the description of .TP}.  Simply say "with no indentation"
	instead.

2020-08-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man.in (Description/Number registers): Inform
	reader that registers can be set in man.local file and
	cross-reference it.
	(Files/*/man.local): [style] Supply example of man.local
	customizations, prompted by recent discussions on groff,
	linux-man, and man-db mailing lists.

2020-08-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tmac.am: Use a stamp file for m4 keyword check.
	(M4CHECK): Add stamp file variable.
	($(M4CHECK)): Create stamp file if check succeeds.

2020-08-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	Split groff_man(7) into two pages; one a (relatively) terse
	reference and the other a tutorial and style guide.  Both are
	generated from the same source, which is processed by m4 into
	two man page sources.

	* tmac/groff_man.7.man: Rename...
	* tmac/groff_man.7.man.in: ...to this.

	* tmac/groff_man.7.man.in: Add m4 directives and define macros.
	Protect m4 keywords in English from unintended expansion (this
	affected the word "include").  Add new .TH and apropos lines for
	style guide.  Convert marker comments into m4 macros for content
	control.  Uncomment material intended only for basic reference
	page.

	* tmac/tmac.am (man7_MANS): Add groff_man_style.7.
	(EXTRADIST) Add groff_man.7.man.in.
	(MOSTLYCLEANFILES): Add m4-generated man page sources
	tmac/groff_man{,_style}.7.man.
	Add targets to generate those same two pages from the renamed
	file.  Add target to grep the page for unprotected English m4
	keywords and halt the build if they are found.  Make generation
	of those pages depend on this new target.

2020-08-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man: Add material on hooks and encoding.
	(Description, ./Deprecated features): Stop identifying .PT and
	.BT as "deprecated"; they shouldn't ever be called in man pages,
	but that has never been their intention.
	(Description): Identify character encoding and line-ending
	requirements (tutorial/style-guide material).
	(Description/Hooks): Add new subsection to house descriptions of
	.PT and .BT.  Add mnemonic expansions for both.

2020-07-31  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Control Characters): Incorrect claims were
	made.  Double quotes can indeed be used to enclose arguments to
	string interpolations.  The statement about a leading " in a
	string definition (or appendment with .as) was stated too
	generally.  The leading quote is not necessary to include
	leading tab characters, which can be input as-is, even in
	compatibility mode.

2020-07-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Requests/Request short reference/.ft): Fix
	some outright damage in the description of the request; the
	escape sequences that are synonymous with a nullary .ft had been
	wrongly removed.

2020-07-25  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/meintro.me:
	* doc/meref.me:
	* tmac/e.tmac-u: Remove postal address for Eric Allman.  It's
	probably decades out of date.  Adjust footnote symbols.  Thanks
	to Dave Kemper for the bug report and the patch.  Fixes
	<https://savannah.gnu.org/bugs/?58726>.

2020-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	Migrate macro packages from font CW to CR.  The font name "CW"
	{"constant-width"} is a legacy item we can dispose of (except
	for the DVI device, which also has CWI for "constant-width
	italic"), and much of the groff codebase already did starting
	with commit 0de1d6d79cdb959ffa7dac3af77c2a36ef31873f {October
	2017}.  Courier is available in the usual four styles {roman,
	bold, italic, bold+italic}.

	* tmac/an-ext.tmac (.EX): Set font to R, not CW.  The existing
	.ft request was somewhat redundant with the '.do fam C'
	immediately before, which set the font family to Courier.
	* tmac/s.tmac (.UC): Use font CR, not CW.

2020-07-23  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tty.tmac: Stop suppressing nonexistent font warning.
	Prompted by a 2017 suggestion and patch from Bjarni Ingi
	Gislason.  Documents and macro packages that want to change the
	font family should do so in awareness that this is meaningless
	on terminal (nroff) devices (and -Thtml as well).

	Fixes <https://savannah.gnu.org/bugs/?51364>.

2020-07-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man (.PP, .LP, .P): Fix error: these macros
	do not reset the left margin.

2020-07-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Strings): Document behavior of .ds request
	when only one argument is supplied.  (The string is defined as
	empty.)  Thanks to Dave Kemper for the report and the patch.

	Fixes <https://savannah.gnu.org/bugs/?58746>.

2020-07-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Using Symbols): Fix error in .rfschar
	description, which should refer to "font f" rather than "glyph
	f".  Thanks to Dave Kemper for the report and the patch.

	Fixes <https://savannah.gnu.org/bugs/?58767>.

2020-07-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man (.EE, .YS): Fix error: refer to "initial
	hyphenation setting" instead of "previous hyphenation mode".
	Incidentally, this fact points out why putting ".hy 0" or ".nh"
	in your man page is futile.

2020-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Requests/Request short reference): Fix error
	in description of .hc; it changes the hyphenation character
	rather than supplying an additional one.

2020-06-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Groff Options): Remove editorial comment about
	'-a' option being "useless".  It isn't.  Update example for
	contemporary systems (like Debian) and to reflect the fact that
	the GNU troff(1) man page needs to be preprocessed with tbl(1).
	(Invoking grotty): Recast discussion of -c option, importing
	much language from grotty(1) page rewrite from a year ago.  Add
	program index entries for col, more, and ul.  Fix transposition
	error in ISO document number.

	* src/devices/grotty/grotty.1.man (Description/Legacy output
	format): Make slight wording changes prompted by content of
	parallel section in our Texinfo manual.

	* src/roff/groff/groff.1.man (Options/-a): Parallelize with
	first sentence of corresponding material in our Texinfo
	manual.

	* src/roff/troff/troff.1.man (Options/-a): Parallelize with
	our Texinfo manual.

	Fixes the rest of
	<https://savannah.gnu.org/bugs/?55278>.

2020-06-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff_diff.7.man (Language/Long names): Fix error: groff
	adds three new requests with short names, not two.  List them in
	an adjacent comment.

2020-06-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-ext.tmac (.ME, .UE): Fix portability issue.  While
	widely supported, the \$* escape is not documented in CSTR #54.
	If groff is not the typesetter, append macro arguments using
	\$1, \$2, ..., \$9 instead.

2020-05-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* man/groff.7.man (Numerical Expressions): Fix error: negative
	expressions evaluate false, not true as was implied.
	Parallelize descriptions with our Texinfo manual and
	groff_diff(7) (in abbreviated form).

2020-05-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Manipulating Filling and Adjusting): Fix error
	in code sample: missing 'n' in number register interpolation.

2020-05-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/preconv/tests/smoke-test.sh: Make BOM detection
	override less hinky (i.e., use more normative input).  Add tests
	for all five detected BOMs.

2020-05-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/env.cpp (space_size): Prevent assertion
	failure.  If an argument to the .ss request is negative, throw a
	range warning and ignore it.
	* src/roff/groff/tests/regression_savannah_58337.sh: Add test.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	Fixes https://savannah.gnu.org/bugs/?58337.

2020-05-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	Update documentation of .ss request.

	* doc/groff.texi (Manipulating Filling and Adjusting): Rewrite
	documentation of .ss request and \n[.ss] and \n[.sss] escapes.
	Note that negative values are not permitted in either argument
	to .ss.  Use new terminology, "minimal inter-word spacing" and
	"additional inter-sentence spacing" for clarity.  Clarify that
	additional inter-sentence spacing is only used when the output
	line is not full when the end of a sentence occurs.  Add index
	nodes to help readers find discussion of details of spacing
	between words and sentences.  Move discussion of differences
	from AT&T troff to section "Implementation Differences".  Update
	example to more closely resemble a real-world case, use second
	argument to .ss request, and eliminate hackish use of .nop
	request.

	* man/groff_diff.7.man (New number registers): Recast in
	parallel with the foregoing.

	* man/groff.7.man (Read-only registers): Use new terminology and
	describe \n[.ss] and \n[.sss] in meaningful terms, not by
	reference to arguments to the .ss request (which wasn't even
	accurate, because these registers have default values).

	Fixes https://savannah.gnu.org/bugs/?54101.

2020-05-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	Undocument plans to support end-of-file GNU Emacs coding tags.

	* src/preproc/preconv/preconv.cpp (check_coding_tag):  Update
	comments.
	(detect_file_encoding): Alter debugging output so it's easier to
	grep and verify Emacs coding tag detection.

	* src/preproc/preconv/preconv.1.man (Bugs): Delete; its sole
	concern was the absence of this feature.
	(Usage): Document detection algorithm in more detail.  Note
	which detection methods don't work on unseekable input (pipes).
	Offer recommendations for those struggling with encoding
	detection.
	(Usage/Coding Tags): Stop manipulating line adjustment.  Use
	hyphen-minus (\- escape) characters in coding tag names, since
	they are literals that one might copy and paste.  Stop
	referencing XEmacs, whose development appears moribund.
	(See Also): Add cross-references to iconv(3) and locale(7) man
	pages.

	* src/preproc/preconv/tests/smoke-test.sh: Test each of the
	steps in the detection algorithm.
	* src/preproc/preconv/preconv.am: Run test.
	(preconv_TESTS): Add new variable.
	(TESTS): Append $(preconv_TESTS).

2020-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/afmtodit/afmtodit.pl: Format usage message with
	full capitals for parameters, and break out -v option in a
	separate "synopsis".

2020-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	* font/devpdf/util/BuildFoundries.pl: Stop throwing away
	diagnostics from afmtodit.  This results in only one extra line
	of build output:

		both Upsilon1 and Upsilon map to *U at .../afmtodit line
		6413.

2020-05-05  G. Branden Robinson <g.branden.robinson@gmail.com>

	Correct documentation of .pm request.

	* man/groff.7.man (Requests/Request short reference): The .pm
	request's classical behavior was described instead of groff's,
	and omitted mention of strings and diversions; correct it.

	* man/groff_diff.7.man (Implementation Differences): Document
	this difference between AT&T troff and groff.

	* doc/groff.texi (Debugging): Relocate description of .pm
	behavioral difference...
	(Implementation Differences): ...hither.

2020-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/addftinfo/addftinfo.cpp (usage):
	* src/utils/tfmtodit/tfmtodit.cpp (usage): Add "usage:" prefix
	to messages documenting auxiliary modes of invoking the program.
	The output doesn't look right without one, and it feels
	dishonest to not document the relevant options (-v, --version)
	disjunctively.  I'm trying to strike a balance between the
	ultra-terse BSD approach and the ultra-garrulous GNU one (see,
	e.g., ls(1)).  Likely both camps will be unhappy.  :-/

2020-04-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/tfmtodit/tfmtodit.cpp (read_map): Report invalid
	character code from map file in diagnostic.
	(main): Report invalid skew character position in diagnostic.
	Explicitly report insufficient arguments in addition to usage
	message.  Lift invariant computed expressions out of loops (more
	to shorten long lines than because I think the compiler won't
	figure it out).  Give content to "impossible assertion".
	(tfm::load): Capitalize TFM initialism in diagnostics.
	(usage): Use full capitals for parameters as is conventional.
	Document disjunction of -v/--version flag from other
	invocations.

2020-04-29  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/utils/addftinfo/addftinfo.cpp (usage): Add overloaded
	version that accepts a constant string argument, which emits the
	argument as a diagnostic and then calls usage().
	(main): Add diagnostics to usage message where the problem is
	clear.  Add comment explaining why it sometimes isn't.
	(usage): Refactor main usage message (which prints the summary)
	to report the actual names of the accepted option arguments
	instead of just "-param", which is not literally accepted.

	Sort param_table alphabetically for use by the usage message.

2020-04-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	Delete groffer.

	Per discussion on the groff development mailing list, there is
	no desire to retain the maintenance of this portion of the groff
	distribution.

	See
	<https://lists.gnu.org/archive/html/groff/2020-04/msg00051.html>
	et seq.

	* contrib/groffer: Recursively delete.

	* Makefile.am:
	* arch/mingw/mingw.am: Stop building groffer.

	* m4/groff.m4 (GROFF_GROFFERDIR_DEFAULT):
	(GROFF_GROFFERDIR_OPTION): Delete; remove "--with-grofferdir"
	configuration option.
	* configure.ac: Stop calling these macros.

	* MANIFEST:
	* NEWS:
	* PROJECTS:
	* TODO:
	* contrib/chem/chem.1.man:
	* contrib/chem/examples/122/README.txt:
	* contrib/chem/examples/README.txt:
	* contrib/glilypond/glilypond.1.man:
	* contrib/gperl/gperl.1.man:
	* contrib/gpinyin/gpinyin.1.man:
	* contrib/groff_filenames/groff_filenames.5.man:
	* man/groff_font.5.man:
	* man/roff.7.man:
	* src/roff/groff/groff.1.man:
	* src/roff/grog/grog.1.man:
	* src/utils/addftinfo/addftinfo.1.man:
	* tmac/groff_trace.7.man: Delete references to groffer.

2020-04-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/include/curtime.h: #include <time.h> if we're returning
	a time_t from current_time().

	* src/libs/libgroff/curtime.cpp (current_time): Quote
	$SOURCE_DATE_EPOCH variable content in diagnostics produced due
	to bad input since it's under user control and could have all
	kinds of bogosity in it (like whitespace).

2020-04-19  G. Branden Robinson <g.branden.robinson@gmail.com>

	* **/*.{man,tmac}: Save compatibility mode robustly.

	Use new \n[.cp] register to save compatibility mode.

	Use register names based on the filename (at the source
	maintenance level) to avoid clobbering other files' saved
	compatibility modes.

	* tmac/html.tmac: Eliminate test of saved-compatibility
	register by moving its body inside the block where compatibility
	mode is off.  This is the only part of this changeset that was
	not automated.

	Fixes <https://savannah.gnu.org/bugs/?58162>.

2020-04-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	Implement new read-only .cp register.

	Within a .do request, \n[.cp] holds the saved value of
	compatibility mode.

	The register \n[.cp] is specialized and may require a statement
	of rationale.  When writing macro packages or documents that use
	groff features and which may be mixed with other packages or
	documents that do not—common scenarios include serial processing
	of man pages or use of the .so or .mso requests—you may desire
	correct operation regardless of compatibility mode in the
	surrounding context.  It may occur to you to save the existing
	value of \n(.C into a register, say, _C, at the beginning of
	your file, turn compatibility mode off with “.cp 0”, then
	restore it from that register at the end with “.cp \n(_C”.  At
	the same time, a modular design of a document or macro package
	may lead you to multiple layers of inclusion.  You cannot use
	the same register name everywhere or you risk “clobbering” the
	value from a preceding or enclosing context.  The two‐character
	register namespace of AT&T troff is confining and mnemonically
	challenging; you may wish to use groff's more capacious
	namespace.  However, attempting “.nr _my_saved_C \n(.C” will not
	work in compatibility mode; the register name is too long.
	“This is exactly what .do is for,” you think, “.do nr
	_my_saved_C \n(.C”.  The foregoing will always save zero to your
	register, because .do turns compatibility mode off while it
	interprets its argument list.  What you need is:
		.do nr _my_saved_C \n[.cp]
		.cp 0
	at the beginning of your file, followed by
		.cp \n[_my_saved_C]
	at the end.  As in the C language, we all have to share one big
	namespace, so choose a register name that is unlikely to collide
	with other uses.

	* src/roff/troff/input.cpp (do_request, init_input_requests):
	Implement it.

	* doc/groff.texi:
	* man/groff.7.man:
	* man/groff_diff.7.man: Document it.

	* src/roff/groff/tests/dot-cp_register_works.sh: Test it.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	Enables a fix for
	<https://savannah.gnu.org/bugs/?58162>.

	Thanks to John Gardner and Ingo Schwarze for the discussion.

2020-04-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Implementation Differences):
	* man/groff_diff.7.man (New requests): Rewrite description of
	.do request, and replace example with a more illustrative one.

	* man/groff.7.man (Request short reference): Rewrite description
	of .do request briefly.

2020-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Implementation Differences): Remove incorrect
	claim.  The .C register cannot be manipulated manually.

2020-04-14  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/smoke-test_html_device.sh: Simplify
	charmap test.

2020-04-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	It's too easy for the nroff version to get desynced from the
	groff version when we're running test cases, leading to spurious
	results.  Make it easier to see a discrepancy.

	* src/roff/nroff/nroff.sh: Call groff with -v or --version when
	we are called that way.  Let test cases tell us to use
	test-groff as groff with an environment variable.

	* src/roff/nroff/tests/verbose_option_works.sh.in: Rename to...
	* src/roff/nroff/tests/verbose_option_works.sh: ...this.  Check
	the nroff version being tested against the groff version being
	wrapped.  This exposes a bug; the system groff rather than the
	build tree groff was being invoked.  Refactor.  Stop messing
	with @GROFF_BIN_PATH_SETUP@ (enabling the rename); instead, let
	test-groff handle that for us.  Locate it and export the
	variable GROFF_TEST_GROFF so nroff can find it.  Because we
	manipulate $PATH to run the tests, the $PATH of an installed
	groff system will _always_ differ from that used by a build
	tree; ignore it in the test cases.  Dispose of bashisms and set
	shebang to /bin/sh.

	* src/roff/nroff/nroff.am: Stop generating the above test
	script.  It can now be run as it ships.

2020-04-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	Make our assert() C99-conformant.

	groff has its own implementation of the standard C library's
	assert() macro.  It hasn't been updated since C89.  C99 requires
	that the diagnostic emitted by assert() contain the failing
	expression and name of the function in scope.

	* src/include/assert.h: Add additional pointer to const char
	arguments to do_assert() and assertion_failed() for function
	name and stringified expression.
	(assertion_failed): Update prototype.
	(do_assert): Accept 'func' and 'msg' parameters and pass them to
	assertion_failed().
	(assert): Update macro to collect '__func__' and stringify the
	expr parameter (as 'msg') and pass them do do_assert().
	* src/libs/libgroff/assert.cpp (assertion_failed): Rewrite
	diagnostic to more closely match GNU Coding Style format and
	also report function and failing expression.

	Example output:
		troff: ../src/roff/troff/input.cpp:2644: do_request():
		assertion failed: '0 == "But first, here's a rotten old
		BBC programme."'

	We have no excuse to assert(0) ever again.  Express the
	invariant that has been violated.

2020-04-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/smoke-test_html_device.sh: Set
	LC_CTYPE=C.UTF-8 so that byte sequences in the pipelines are
	handled correctly.  Skip the test if the environment doesn't
	support UTF-8.  Thanks to Bjarni Ingi Gislason for the trouble
	report.

	Fixes <https://savannah.gnu.org/bugs/?58164>.

2020-04-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/html.tmac: Use .do so we correctly load unicode.tmac in
	compatibility mode.

	Fixes the following problem (wrapped, filenames abbreviated):

	$ echo | ./build/test-groff -C -Thtml >/dev/null
	troff: backtrace: file '.../groff/build/../tmac/html.tmac':546
	troff: backtrace: file '.../groff/build/../tmac/troffrc':30
	troff: .../groff/build/../tmac/html.tmac:546: warning: macro
		'ms' not defined

2020-04-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/smoke-test_html_device.sh: Add test.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2020-04-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/regression_savannah_58153.sh:
	* src/roff/groff/tests/\
	use_point_size_escape_with_single_digit_arg.sh: Use "set -e" to
	ensure that multi-test script files don't hide problems.  There
	are arguments against "set -e" (and you can ask Greg Wooledge
	for all of them), but I'm so used to it from years of writing
	Debian package maintainer scripts that I feel comfortable with
	it.  It is less verbose than several alternatives (especially
	having one test script per case).

	* src/roff/groff/tests/string_case_xform_unicode_escape.sh:
	Update with respect to new failure output (in a comment only,
	since this is an XFAIL test).

	* tmac/tests/an-old_AT_and_UC_footer_saved_and_restored.sh:
	Drop unnecessary "|| exit 1" from end of script.  Incidentally,
	this script illustrates an alternative to "set -e".

2020-04-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Rework documentation of .spreadwarn.

	* doc/groff.texi (Debugging):
	* man/groff.7.man (Request short reference):
	* man/groff_diff.7.man (New requests): Recast description of
	.spreadwarn request, some based on suggestions from Dave Kemper.
	Make more prominent the fact that spreading only applies to
	adjustment mode 'b'.  Document warning type used.

	Fixes half of Savannah #58035.

2020-04-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Require Texinfo 5.0 (February 2013) at a minimum.

	* m4/groff.m4 (GROFF_MAKEINFO): Check for version 5.0 (increased
	from 4.8).  Update diagnostics and comments.

	* INSTALL.extra:
	* README:
	* doc/groff.texi:
	* doc/webpage.ms: Document updated requirement.

	* doc/fixinfo.sh: Delete; it is no longer necessary to work
	around Texinfo 4.x bugs.

	* doc/doc.am (EXTRA_DIST): Stop shipping fixinfo.sh.
	(.texi.html): Remove makeinfo < 5.0 version check and consequent
	execution of fixinfo.sh.  Update comment.

2020-04-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	Enable backtracing across process/file boundaries when errors or
	non-ignored warnings are encountered.

	Experimentation reveals that .so, .mso, and .pso requests acted
	as barriers to backtracing except when explicitly requested with
	the .backtrace request.  Judging by the git history, this
	behavior dates back to June 1991 or earlier.  The intention,
	according to a source comment, was only to suppress the
	backtrace output for the line corresponding to the outermost
	level of the input stack (commonly, a file argument to groff).
	Unfortunately, that wasn't its only effect.

	This change does result in one additional line of output for
	each error or (non-ignored) warning when -b is given.  However,
	I regard this as unobjectionable because {1} a backtrace was in
	fact explicitly requested; and {2} it seems a poor tradeoff to
	suppress most of the backtrace in some complicated and
	frustrating cases for the sake of one fewer line of backtrace
	output in a trivial one.

	Now, backtracing behaves the same no matter what triggers it.

	Fixes Savannah #58153.

	* src/roff/troff/input.cpp (file_iterator::backtrace): Call
	get_location() for its side effect of rewriting a filename of
	"-" to "<standard input>", for consistency with other diagnostic
	messages.  (In this class, this member function always returns
	1, so ignore the return value.  This fact is an essential part
	of what led to the bug; the conditional
		p && !p->get_location(0, &f, &n)
	which appeared in the for loop of input_stack::backtrace() prior
	to this change would always evaluate to false when a node of the
	file_iterator class was encountered.)
	(input_stack::backtrace): Replace member function body with that
	of input_stack::backtrace_all().
	(input_stack::backtrace_all): Delete.
	(backtrace_request): Update the only call site of the above.

	* src/roff/groff/tests/regression_savannah_58153.sh: Add test.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

	* src/roff/groff/tests/string_case_xform_errors.sh: Update
	regression test to not be confounded by additional line of
	backtrace output.  Remove bashism along the way.

	* doc/groff.texi:
	* man/groff.7.man:
	* man/groff_diff.7.man: Update documentation.

2020-04-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	Reorganize backtrace output.

	* src/roff/troff/input.cpp (string_iterator::backtrace):
	Prefix the output with the program name if it is known.  In a
	deviation from the GNU Coding Standards, put the string
	"backtrace:" immediately next instead of the file and line
	number; this is because, particularly in cases where the
	backtrace is most interesting or needed, it will produce
	multiple lines of output and the common prefix aids visual
	understanding.
	(file_iterator::backtrace): As above; also, change prefix for
	popened nodes in the iterator from "process" to "pipe".  This
	seemed preferable to omitting the information entirely or using
	an inscrutable sigil like 'f' or 'p'.  The advantage is that the
	output is better aligned--better ergonomics for those who have
	to cope with a lot of it.  Furthermore, output the filename only
	once.

	Example of old and new output:

	/tmp/inner:2: backtrace: file '/tmp/inner'
	echo .so /tmp/inner:1: backtrace: process 'echo .so /tmp/inner'
	/tmp/outer:1: backtrace: file '/tmp/outer'

	troff: backtrace: file '/tmp/inner':2
	troff: backtrace: pipe 'echo .so /tmp/inner':1
	troff: backtrace: file '/tmp/outer':1

2020-04-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_size): Add units to diagnostic.
	This function works only with device-specific basic units
	internally; users likely think in terms of point size, so add
	the basic unit suffix "u" to offer a hint about what's going on.

	Example:
	$ groff -ww >/dev/null
	\s[10]A\s[-12]B
	troff: <standard input>:1: warning: point-size escape results in
	non-positive size -2000u; set to 1u

	On a PostScript device with 1000 basic units to the point, the
	difference is important and would be confusing without the unit
	indication.

2020-04-08  G. Branden Robinson <g.branden.robinson@gmail.com>

	Correct and clarify point size documentation.

	Our Texinfo manual has long documented the request '.ps 0' as
	restoring the previous point size (just as '\s0' or '.ps' with
	no argument does), but this is incorrect; since groff 1.02 or
	earlier (June 1991), the request has not actually worked this
	way.  Instead, '.ps 0' sets the point size to 1 basic unit
	{though output drivers may clamp this to a higher value}.  This
	behavior is consistent with AT&T troff, Hierloom Doctools troff
	and, per Ingo Schwarze, Plan 9 troff.  (It is, however, not
	consistent with neatroff.)

	* doc/groff.texi (Changing Type Sizes): Stop claiming that '.ps
	0' works like '\s0'.  Note that the resulting (computed) point
	size, not the argument, is clamped.  Note that it is
	non-positive, not negative, point sizes that are clamped to 1u.
	Add (forward) cross-reference to section where \n[.ps] is
	defined since it is mentioned here.  Move explanation of special
	handling of zero argument to \s escape description.

	* man/groff.7.man (Request short reference): Explain .ps N
	independently of \s.  Note clamping behavior.

2020-04-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_size): Correctly brace 'else'
	block.

	* src/roff/groff/tests/\
	use_point_size_escape_with_single_digit_arg.sh:
	Check that we get a diagnostic when relying on ambiguous form.

2020-04-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp (read_size): Move special-case
	interpretation of the '\sN' form of point-size escapes when 'N'
	is 1, 2, or 3 to compatibility mode (groff -C) only, and throw
	error diagnostic with suggestion for remedy if encountered.

	Traditionally, '\s36A' is interpreted as "set point size to 36,
	then emit 'A'".  However, only values in the range 10-39 are
	handled specially; '\s40A' is interpreted as a four-point "0A".
	This is unlike anything else in *roff grammar; see \*, \$, \f,
	\F, \g, \k, \m, \M, \n, \V, \Y, and \z.

	To anticipate objections: Why not throw only a warning?  Because
	there isn't a warning category for supported but ambiguous
	syntax (this behavior of AT&T troff dates back to the mid-1970s
	but was not documented in the Troff User's Manual until 1992).
	Why not throw the error outside of compatibility mode too?
	Because outside of compatibility mode we (now) have an
	unambiguous parse.

	Background: The Graphic Systems C/A/T phototypesetter (the
	original device target for AT&T troff) only supported a few
	discrete point sizes in the range 6..36, so Ossanna
	special-cased the parser to do what the user must have meant.
	Kernighan warned of this in the 1992 revision of CSTR #54
	{§2.3}, and more recently, McIlroy referred to it as a "living
	fossil".

	See:
	  https://lists.gnu.org/archive/html/groff/2020-03/msg00054.html
	  https://lists.gnu.org/archive/html/groff/2020-04/msg00002.html
	  https://lists.gnu.org/archive/html/groff/2020-04/msg00015.html
	and follow-ups for discussion.

	* NEWS: Advise users of behavior change and offer guidance.

	* doc/groff.texi:
	* man/groff.7.man: Document the restriction of special handling
	of point-size arguments to '\s' to compatibility mode.

	* src/roff/groff/tests/\
	use_point_size_escape_with_single_digit_arg.sh: Add regression
	test.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2020-04-04  G. Branden Robinson <g.branden.robinson@gmail.com>

	Improve point-size escape diagnostics.

	* src/roff/troff/input.cpp (read_size): Disclose context
	{point-size escape interpretation} in diagnostic messages.  When
	a "bad digit" is encountered, describe it if possible.  When a
	relative adjustment results in a negative point size, report the
	computed value.  Also rename a variable for slightly more
	clarity ("bad" does not refer to all bad parses, just some cases
	of bad digits), and update an insufficiently generalized comment
	{"\s(00" is also an acceptable expression for point-size zero}.

	Based on suggestions by Ingo Schwarze and Bjarni Ingi Gislason.

2020-04-01  G. Branden Robinson <g.branden.robinson@gmail.com>

	Align diagnostic message format.

	* src/libs/libgroff/error.cpp (do_error_with_file_and_line):
	* src/roff/troff/input.cpp (do_error):
	Display the diagnostic level when it is "error", instead of
	leaving it implicit.

	* src/roff/troff/input.cpp (error_with_file_and_line): Include
	the program name in the diagnostic message if it is known.

	* src/roff/groff/tests/string_case_xform_errors.sh: Update
	diagnostic message expectation.

2020-02-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi (Page Motions):
	* man/groff.7.man (Single-character escapes): Document
	non-breaking spaces as such.

	Report and patch by Dave Kemper <saint.snit@gmail.com>.
	Fixes <https://savannah.gnu.org/bugs/?55954>.

2020-02-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	nroff: Implement -P and -V options.

	* src/roff/nroff/nroff.sh: Recognize -P option (with argument)
	and pass it through to groff.  Recognize -V option; if given,
	display constructed groff command instead of executing it.
	Update usage message to document new options.  Tidy up shell
	style and indentation.  Add comments.
	* src/roff/nroff/nroff.1.man: Document new -P and -V options.
	* src/roff/nroff/tests/verbose_option_works.sh.in: Test -V
	option.
	* src/roff/nroff/nroff.am: Generate test and run it.

2020-02-06  G. Branden Robinson <g.branden.robinson@gmail.com>

	Stop ms macro package from manipulating warnings.

	* tmac/s.tmac: Remove code block that attempted to enable all
	warnings "only if none are given on the command line".  It did
	this by simply comparing the value of the warn register
	{\n[.warn]} against the default value; but of course, a user
	could specify -w options that exactly matched the default and
	the test would not be able to tell, causing puzzling and
	undesired behavior.  Furthermore, the hard-coded default was out
	of date and did not correspond to recent releases of groff.  If
	you want all warnings on, use the ".warn" request with no
	arguments in your ms document or pass "-w w" to groff (see
	troff(1) or our Texinfo manual for more on warnings).

	Thanks to Bjarni Ingi Gislason for bringing this issue to our
	attention.

	Resolves <https://savannah.gnu.org/bugs/?57583>.

2020-01-21  George HELFFRICH  <ghfbsd@gmail.com>

	[me]: Fix regression of '.nm' (#57638).

	* tmac/e.tmac-u (nm): Use saved point size and font position
	for line numbering only if those registers exist.

	Fixes <https://savannah.gnu.org/bugs/?57638>.

2020-01-18  Ingo Schwarze  <schwarze@openbsd.org>

	Accept any number of arguments for .Dd in the groff_mdoc(7)
	macros.

	* tmac/doc-common-u: The .Dd macro behaved in a weird way:
	Without arguments, it printed the string "Epoch".
	With one, two, four, or more arguments, it ignored all arguments
	and used the current date instead.
	Only for exactly three arguments, it printed the arguments.
	None of this made sense.  Giving the date as "Epoch" is
	absurd, and printing the current date is just misleading:
	why should a document be considered up-to-date when the author
	did not even bother to state the date of the last change?
	Admittedly, the behaviour for 0 and 4 or more arguments
	already appeared 4.3BSD-Reno, and the behaviour for 2 or 3
	arguments in 4.4BSD.  But it was already wrong even in those
	days: several manual pages in 4.4BSD gave .Dd a single, quoted
	argument, e.g. .Dd "June 9, 1993": cap_mkdb(1), id(1), sed(1),
	err(3), getcap(3), sysctl(3), amd(8), disklabel(8), and others.
	Consequently, simply print all the arguments, no matter how
	many there are.

	This bug was found by Jonathan Gray <jsg@openbsd.org>
	while he looked at 4.xBSD manual pages.

2020-01-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* doc/groff.texi: Document initial empty set membership of
	characters with cflags values of 128, 256, or 512 in parallel
	with preceding paragraphs regarding smaller powers of two.

	Report and patch by Dave Kemper <saint.snit@gmail.com>.
	Fixes <https://savannah.gnu.org/bugs/?57549>.

2020-01-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/*.sh: Rename some tests so their
	filenames are more self-descriptive.
	* src/roff/groff/groff.am (groff_TESTS): Update.

2020-01-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/groff/tests/transparent_end-of-sentence_chars.sh: Add
	test for end-of-sentence recognition.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2020-01-18  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp: Mark \[dd] character (double dagger)
	as transparent for purposes of end-of-sentence recognition.

	* doc/groff.texi (Sentences):
	* man/groff_diff.7.man (New requests/.cflags): Document this.

	Report and patch by Dave Kemper <saint.snit@gmail.com>.
	Fixes <https://savannah.gnu.org/bugs/?57546>.

2020-01-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.1.man (See Also):
	* src/utils/indxbib/indxbib.1.man (See Also):
	* src/utils/lkbib/lkbib.1.man (See Also):
	* src/utils/lookbib/lookbib.1.man (See Also): Add bibliographic
	reference to the original Bell Labs "refer" paper by Mike Lesk.

2020-01-17  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_AT_and_UC_footer_saved_and_restored.sh: Add
	regression test for Ingo's change below.

2020-01-16  Ingo Schwarze  <schwarze@openbsd.org>

	Repair .AT and .UC in the groff_man(7) macros.

	* tmac/an-old.tmac: Setting user-defined strings in a macro that
	will later be called indirectly from page location traps is
	excessively complicated.  Besides, the implementation doesn't
	work: when the trap is finally sprung, the defaults from the
	an-init macro clobber what the author specified with .AT or .UC.
	Instead, all that is needed is setting the strings for the
	header before triggering the page break, such that they appear
	right away, while setting the strings for the footer after the
	page break, such that they don't appear on the previous page.

	This bug was found by Jonathan Gray <jsg@openbsd.org> while he
	looked at 4.xBSD manual pages.

2020-01-16  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/groff_man.7.man (Document structure macros/.SH): Fix
	errors in footer description.

2020-01-12  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/tests/an-old_CS_register_on.sh: Tweak flags; all the
	other tests in this group pass "-Tascii -P-cbou" instead of
	"-Tutf8".  (This is so that output is easy to grep from a shell
	script.)  Bring this test into line.  Does not regress anything.

2019-12-30  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Certain pdfmark destination names caused gropdf to fail.

	* src/devices/gropdf/gropdf.pl: Look for pdfmark types, (i.e.
	DEST, OUT, ANN), only preceding 'pdfmark' at end of line, not
	anywhere else.

2019-12-30  Ingo Schwarze  <schwarze@openbsd.org>

	Correct output of sprintf("%%") in pic(1).

	* src/preproc/pic/pic.ypp: Print "%" rather than "%%".

	Bug reported by Doug McIlroy <doug at cs dot dartmouth dot edu>.
	Patch using feedback from Larry McVoy <lm at mcvoy dot com>.

2019-12-29  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Update man page of gropdf to document \X calls.

	* src/devices/gropdf/gropdf.1.man: The calls 'pagename' and
	  'switchtopage' (used by mom to relocate TOC) are documented,
	  together with their convenience commands '.pdfpagename' and
	  '.pdfswitchtopage'.

2019-12-29  Ingo Schwarze  <schwarze@openbsd.org>

	Improve documentation of pic(1) regarding printf.

	* src/preproc/pic/pic.1.man:
	  Document which conversion specifications are supported.
	* doc/pic.ms:
	  Correct the list of supported conversion specifications.

2019-12-21  Ingo Schwarze  <schwarze@openbsd.org>

	Update NetBSD, OpenBSD, FreeBSD, Darwin, and DragonFly version
	strings.

	* tmac/doc-common-u: Update.
	* tmac/groff_mdoc.7.man: Synchronize.

	Based on a patch from Guillem Jover <guillem@debian.org>
	via Colin Watson <cjwatson@debian.org>, tweaked by me.
	Fixes: https://bugs.debian.org/867123

2019-09-22  G. Branden Robinson <g.branden.robinson@gmail.com>

	Use a vertical spacing of 1v between paragraphs in man page
	examples.  This looks better (on typesetter devices like
	PostScript and PDF) with the Courier font family also used in
	examples.  Typewriter devices (like the terminal) already used
	an inter-paragraph spacing of 1v.

	* tmac/an-ext.tmac (EX): Save the value of the PD number
	register (inter-paragraph distance), and set it to 1v.
	(EE): Restore previous value of the PD register.

2019-09-21  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Changes to allow configure to check for URW fonts

	* font/devpdf/util/BuildFoundries.pl: Call the program with
	--dirURW with path provided to ./configure, and --check to do
	a dry-run just checking if the fonts are available. (bug #56748)

2019-09-21  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Add new ghostscript font names (bug #56748)

	* font/devpdf/Foundry.in: Add changed font names

2019-09-21  Deri James  <deri@chuzzlewit.myzen.co.uk>

	Prevent gropdf executing arbitrary commands

	* src/devices/gropdf/gropdf.pl: See bug #55557

2019-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/an-old.tmac: Move test for definitions of CS and CT
	registers to after man.local is sourced; this way we can both
	respect any setting of those registers in that file (which is
	intended for customization by the site administrator) and ensure
	that the registers are defined when dereferenced later.

2019-09-15  G. Branden Robinson <g.branden.robinson@gmail.com>

	* **/*.man: Put section headings in title case.

2019-09-13  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/roff/troff/input.cpp: Lift invariant out of loop.

2019-09-11  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/preproc/refer/refer.1.man: Add mention of man and mm
	packages as supporting the "refer" preprocessor (GNU mm grew
	this support back in groff 1.22.1).

2019-09-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	Mark expected-to-fail test as XFAIL.

	Automake supports XFAIL and XPASS, so actually use the
	infrastructure as intended.

	* Makefile.am: Declare XFAIL_TESTS variable.
	* src/roff/groff/groff.am (groff_XFAIL_TESTS): Add
	string_case_xform_unicode_escape.sh.
	* src/roff/groff/tests/string_case_xform_unicode_escape.sh: Set
	the expected output to what it would be if string case
	transforms worked on groff Unicode escapes.

2019-09-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	Retire '@G@' build system macro.

	It existed only for forcibly-capitalized man page titles; it was
	the uppercase-transformed counterpart of @g@.

	* Makefile.am: Delete sed transformation of @G@.
	* src/preproc/tbl/tbl.1.man: Replace '@G@EQN' in section heading
	with '@g@eqn'.

2019-09-10  G. Branden Robinson <g.branden.robinson@gmail.com>

	* **/*.man: Downcase man page titles, except for glilypond and
	roff2*, which did not require it.

	Here's a sed script for the aid of those who have a corpus of
	man pages to migrate.

		# Downcase man page titles.
		#
		# Use the first line to skip any .TH lines that require
		# special handling, perhaps because the name of the
		# command gets externally macro-expanded.  In groff, the
		# "roff2.1.man" page is an example.
		#
		# This script operates _only_ on .TH lines.
		#
		# usage: sed -i -f this_script.sed your_man_page.1 ...
		/@ROFF2MODE@/b
		/^\.\s*TH/{
		h
		s/^\.\s*TH \+\([^ ]\+\) .*/\1/
		y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
		G
		s/\([^ ]\+\)\n\(^\.\s*TH \+\)[^ ]\+\( .*\)/\2\1\3/
		}

2019-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	The an (man) macro package supports new CS and CT number
	registers to control rendering of man page section headings and
	titles, respectively, in full capitals.  These default off (with
	no visible effect on pages which already fully capitalize these
	strings in man page sources).  The rationale is to encourage man
	page authors to preserve case distinction information in (or
	restore it to) their titles and section headings, while giving
	users (including system administrators, distributors,
	integrators, and maintainers of man(1) implementations) a way to
	view the rendered page elements in full capitals if desired.

	* tmac/an-old.tmac (TH/an-init): If number register CT is
	defined and nonzero, call .stringup on \*[an-title].
	(SH): Store macro argument list to \*[an-section-heading].  If
	number register CS is defined and nonzero, call .stringup on it.
	* tmac/groff_man.7.man (OPTIONS): Document the CS and CT number
	registers.
	* tmac/tests/an-old_CS_register_off.sh:
	* tmac/tests/an-old_CS_register_on.sh:
	* tmac/tests/an-old_CS_register_unspecified.sh:
	* tmac/tests/an-old_CT_register_off.sh:
	* tmac/tests/an-old_CT_register_on.sh:
	* tmac/tests/an-old_CT_register_unspecified.sh: Add tests.
	* tmac/tmac.am (tmac_TESTS): Run tests.

2019-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Add regression test to check behavior of case transformation
	request on a string containing a Unicode character escape.
	Right now, this is not supported, so it is an XFAIL test in the
	parlance of DejaGNU/POSIX 1003.3.

	* src/roff/groff/tests/string_case_xform_unicode_escape.sh: New
	test.
	* src/roff/groff/groff.am (groff_TESTS): Run test.

2019-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Implement .stringdown and .stringup requests.

	* src/roff/troff/input.cpp: Add .stringdown and .stringup
	requests.
	* doc/groff.texi: Document them, including example.
	* man/groff_diff.7.man: Same.
	* man/groff.7.man: Document them briefly.

2019-09-09  G. Branden Robinson <g.branden.robinson@gmail.com>

	Regression-test string case transform feature.

	* src/roff/groff/tests/string_case_xform_errors.sh: New test.
	* src/roff/groff/tests/string_case_xform_requests.sh: New test.
	* src/roff/groff/groff.am (groff_TESTS): Run tests.

2019-06-30  G. Branden Robinson <g.branden.robinson@gmail.com>

	* src/devices/grotty/grotty.1.man (Options/-i): Note support of
	recent versions of xterm for italic (oblique) styles.

	Fixes part of <https://savannah.gnu.org/bugs/?55278>.

2019-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	devlatin1: Map \(oq to ' on output.

	* font/devlatin1/R.proto: Render the output glyph \[oq]
	{opening quote} as 0x27 (apostrophe) instead of 0x60 (grave
	accent).  A grave accent is just flat wrong for the Latin-1
	character set, a.k.a. ISO 8859-1.  The defining document ECMA-94
	{June 1986} is freely available for perusal.  The ECMA-94 Latin
	character sets do not define any glyphs for directional
	{"typographer's"} quotation marks, but the apostrophe is
	depicted as a neutral (vertical) glyph, whereas the grave accent
	0x60 and acute accent 0xB4 are mirror-symmetric diacritical
	marks.

	Note that this change has no effect on _input_ conventions for
	roff source documents.  You can still get directional single
	quotes on UTF-8, PostScript, PDF, and other output devices
	supporting them by typing sequences like `this' in the input
	{character remapping with ".char" requests and similar
	notwithstanding}.

	Patch and idea from Ingo Schwarze, who originally proposed it
	for ASCII as well, and included Latin-1 for parallelism.
	The groff developers could reach no consensus about the wisdom
	of such a change for ASCII (which was designed to support
	ambiguity for some code points, requiring the development of
	supplementary interpretation conventions between parties).
	ECMA-94/ISO-8859 is more strongly prescriptive.

	See https://savannah.gnu.org/bugs/?55616 and the groff mailing
	list archives for 31 January to 23 February 2019 at
	https://lists.gnu.org/archive/html/groff for lengthy discussion.

	* src/roff/groff/tests/on-latin1-device-oq-is-0x27.sh: Check for
	correct output glyph.

	* src/roff/groff/groff.am: Add test.

2019-06-28  G. Branden Robinson <g.branden.robinson@gmail.com>

	* tmac/unicode.tmac: Save and restore compatibility mode since
	the script uses a GNU extension (.char).

2019-06-27  G. Branden Robinson <g.branden.robinson@gmail.com>

	libdriver: Fix SEGV (Savannah #56555).

	* src/libs/libdriver/printer.cpp: Check result of
	set_char_and_width() for error condition before relying on it.

	* src/roff/groff/tests/regression-56555.sh: Provoke segfault
	with five bytes of input using transparent line indicator.

	* src/roff/groff/groff.am: Add test.

	Fixes <https://savannah.gnu.org/bugs/?55278>.

2019-01-12  Ingo Schwarze  <schwarze@openbsd.org>

	Correctly handle groff_mdoc(7) .Lk arguments starting with a
	dot.

	* tmac/doc.tmac-u: Each argument to the .Lk macro is printed
	on its own roff input line.  If it happens to start with a dot
	or apostroph, it was misinterpreted as a request or macro.
	Force it to be treated as text by adding "\&" in front of it.

2018-12-31  Ingo Schwarze  <schwarze@openbsd.org>

	* man/groff_diff.7.man: remove two stray .RE macros


________________________________________________________________________

##### License

Copyright 2018-2021 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.


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