[man pages]: Update man page cross-references.

* 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/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/pic2graph/pic2graph.1.man:
* man/ditroff.7.man:
* man/groff.7.man:
* man/groff_char.7.man:
* man/groff_diff.7.man:
* man/groff_font.5.man:
* src/devices/grohtml/grohtml.1.man:
* src/devices/grolj4/grolj4.1.man:
* src/devices/gropdf/gropdf.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/refer/refer.1.man:
* src/preproc/soelim/soelim.1.man:
* src/preproc/tbl/tbl.1.man:
* src/roff/groff/groff.1.man:
* src/roff/grog/grog.1.man:
* src/roff/nroff/nroff.1.man:
* src/roff/troff/troff.1.man:
* src/utils/afmtodit/afmtodit.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:
* 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:
  + Set page topics in italics, not bold.
  + Add section number to first occurrence in page of non-groff man
    page cross-references.
  + Where they are command-prefixed at build time, lead them with a
    hyphenation suppression escape since we cannot know whether the
    user's choice for the prefix will cause a hyphenation event.  Also
    suppress hyphenation if the page topic could otherwise experience
    it, and stop suppressing hyphenation if it couldn't.  Going ahead
    and implementing .MR is looking better and better...

5 files changed, 28 insertions, 29 deletions

diff --git a/tmac/groff_man.7.man.in b/tmac/groff_man.7.man.in
index 8b45f7cf1..8a7b10d65 100644
--- a/tmac/groff_man.7.man.in
+++ b/tmac/groff_man.7.man.in
@@ -1857,7 +1857,7 @@ check,
 or which is developed in the future.
 .
 The table preprocessor
-.IR @g@tbl (@MAN1EXT@)
+.IR \%@g@tbl (@MAN1EXT@)
 can likely meet your needs.
 _endif()dnl
 .
@@ -2006,9 +2006,9 @@ _endif()dnl
 .\" ====================================================================
 .
 When a preprocessor like
-.I @g@tbl
+.I \%@g@tbl
 or
-.I @g@eqn
+.I \%@g@eqn
 is needed,
 a hint can be given to the man page formatter by making the first line
 of a man page look like this:
@@ -2031,12 +2031,12 @@ The
 .I word
 consists of one letter for each needed preprocessor:
 \(lqe\(rq for
-.IR @g@eqn ,
+.IR \%@g@eqn ,
 \(lqr\(rq for
-.IR @g@refer ,
+.IR \%@g@refer ,
 and
 \(lqt\(rq for
-.IR @g@tbl .
+.IR \%@g@tbl .
 .
 Modern implementations of the
 .I man
@@ -2684,7 +2684,7 @@ to express are likely to be lost.
 .
 If you feel tempted to use it,
 you should probably be composing a table using
-.IR @g@tbl (@MAN1EXT@)
+.IR \%@g@tbl (@MAN1EXT@)
 markup instead.
 .
 .
@@ -3464,10 +3464,10 @@ You can browse it interactively with \(lqinfo groff\(rq.
 .
 .
 .PP
-.IR @g@tbl (@MAN1EXT@),
-.IR @g@eqn (@MAN1EXT@),
+.IR \%@g@tbl (@MAN1EXT@),
+.IR \%@g@eqn (@MAN1EXT@),
 and
-.IR @g@refer (@MAN1EXT@)
+.IR \%@g@refer (@MAN1EXT@)
 are preprocessors used with man pages.
 .
 .
diff --git a/tmac/groff_me.7.man b/tmac/groff_me.7.man
index 0634147c7..940bcf5c9 100644
--- a/tmac/groff_me.7.man
+++ b/tmac/groff_me.7.man
@@ -483,11 +483,9 @@ documenting it while an undergraduate at the University of California.
 .SH "See Also"
 .\" ====================================================================
 .
-.BR groff (@MAN1EXT@),
-.BR troff (@MAN1EXT@)
+.IR groff (@MAN1EXT@),
+.IR troff (@MAN1EXT@)
 .
-.
-.PP
 Two manuals are available in source and rendered form.
 .
 On your system,
@@ -516,12 +514,12 @@ by Eric P.\& Allman and James Clark.
 For preprocessors supported by
 .IR me ,
 see
-.BR eqn (@MAN1EXT@),
-.BR grn (@MAN1EXT@),
-.BR pic (@MAN1EXT@),
-.BR refer (@MAN1EXT@),
+.IR \%@g@eqn (@MAN1EXT@),
+.IR \%@g@grn (@MAN1EXT@),
+.IR \%@g@pic (@MAN1EXT@),
+.IR \%@g@refer (@MAN1EXT@),
 and
-.BR tbl (@MAN1EXT@).
+.IR \%@g@tbl (@MAN1EXT@).
 .
 .
 .\" Restore compatibility mode (for, e.g., Solaris 10/11).
diff --git a/tmac/groff_ms.7.man b/tmac/groff_ms.7.man
index 294d14951..8e7856d1c 100644
--- a/tmac/groff_ms.7.man
+++ b/tmac/groff_ms.7.man
@@ -1120,7 +1120,7 @@ Denote a reference to be processed by the
 preprocessor.
 .
 The GNU
-.IR @g@refer (@MAN1EXT@)
+.IR \%@g@refer (@MAN1EXT@)
 manual page provides a comprehensive reference
 to the preprocessor and the format of the
 bibliographic database.
@@ -1831,11 +1831,11 @@ by Trent A.\& Fisher and Werner Lemberg
 .
 .PP
 .IR groff (@MAN1EXT@),
-.IR @g@troff (@MAN1EXT@),
-.IR @g@tbl (@MAN1EXT@),
-.IR @g@pic (@MAN1EXT@),
-.IR @g@eqn (@MAN1EXT@),
-.IR @g@refer (@MAN1EXT@)
+.IR \%@g@troff (@MAN1EXT@),
+.IR \%@g@tbl (@MAN1EXT@),
+.IR \%@g@pic (@MAN1EXT@),
+.IR \%@g@eqn (@MAN1EXT@),
+.IR \%@g@refer (@MAN1EXT@)
 .
 .
 .\" Restore compatibility mode (for, e.g., Solaris 10/11).
diff --git a/tmac/groff_trace.7.man b/tmac/groff_trace.7.man
index 7eb601901..3882c3ba1 100644
--- a/tmac/groff_trace.7.man
+++ b/tmac/groff_trace.7.man
@@ -45,8 +45,9 @@ groff_trace \- GNU roff macros for debugging groff documents
 The
 .I trace
 macro package of
-.BR groff (@MAN1EXT@)
-can be a valuable tool for debugging documents written in the roff
+.IR groff (@MAN1EXT@)
+can be a valuable tool for debugging documents written in the
+.I roff
 formatting language.
 .
 A call stack trace is protocolled on standard error, this is, a
@@ -258,7 +259,7 @@ macros are kept in the file
 located in the
 .IR "tmac directory" ;
 see
-.BR groff_tmac (@MAN5EXT@)
+.IR groff_tmac (@MAN5EXT@)
 for details.
 .
 .
diff --git a/tmac/groff_www.7.man b/tmac/groff_www.7.man
index 6ebe764a1..3ac5be51f 100644
--- a/tmac/groff_www.7.man
+++ b/tmac/groff_www.7.man
@@ -739,7 +739,7 @@ Bernd Warken
 .\" ====================================================================
 .
 .IR groff (@MAN1EXT@),
-.IR @g@troff (@MAN1EXT@),
+.IR \%@g@troff (@MAN1EXT@),
 .IR \%grohtml (@MAN1EXT@),
 .IR netpbm (1)
 .