tmac/an-ext.tmac: Get out of hyperlink business.

* 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.

  (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:
* tmac/tests/an-ext_MT-body-hyphenates.sh:
* tmac/tests/an-ext_MT-works.sh:
* tmac/tests/an-ext_UR-works.sh: Run tests with `mG` register cleared.

* 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.

* tmac/tests/an-ext_link-macros-work-in-paragraph-tags.sh: Rename...
* tmac/tests/an_link-macros-work-in-paragraph-tags.sh: ...to this.

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

The following 5 tests fail at this commit due to the groff-enhanced MR,
MT, ME, UR, and UE implementations going missing.  This will be fixed in
the next few commits.

FAIL: tmac/tests/an_MR-works.sh
FAIL: tmac/tests/an_MT-works.sh
FAIL: tmac/tests/an_UR-works.sh
FAIL: tmac/tests/an_adjust-link-text-correctly.sh
FAIL: tmac/tests/an_link-macros-work-in-paragraph-tags.sh

1 files changed, 4 insertions, 17 deletions

diff --git a/tmac/tests/an-ext_UR-works.sh b/tmac/tests/an-ext_UR-works.sh
index 074225817..bf5a1abd3 100755
--- a/tmac/tests/an-ext_UR-works.sh
+++ b/tmac/tests/an-ext_UR-works.sh
@@ -40,30 +40,17 @@ Or
 .UR http://\:bar\:.example\:.com
 .UE .'
 
-output=$(printf "%s\n" "$input" | "$groff" -Tascii -P-cbou -man -rU0)
+output=$(printf "%s\n" "$input" \
+    | "$groff" -rmG=0 -Tascii -P-cbou -man -rU0)
 echo "$output"
 
-echo "checking formatting of web URI with link text" \
-    "(hyperlinks disabled)" >&2
+echo "checking formatting of web URI with link text" >&2
 echo "$output" | grep -Fq 'See figure 1 <http://foo.example.com>.' \
     || wail
 
-
-echo "checking formatting of web URI with no link text" \
-    "(hyperlinks disabled)" >&2
+echo "checking formatting of web URI with no link text" >&2
 echo "$output" | grep -Fq 'Or <http://bar.example.com>.' || wail
 
-output=$(printf "%s\n" "$input" | "$groff" -Tascii -P-cbou -man -rU1)
-echo "$output"
-
-echo "checking formatting of web URI with link text" \
-    "(hyperlinks enabled)" >&2
-echo "$output" | grep -Fq 'See figure 1.' || wail
-
-echo "checking formatting of web URI with no link text" \
-    "(hyperlinks enabled)" >&2
-echo "$output" | grep -Fq 'Or http://bar.example.com.' || wail
-
 test -z "$fail"
 
 # vim:set ai et sw=4 ts=4 tw=72: