Clean up in preparation for "MR sed".
From 5ce2b67f5e4ba0f52291f515bed0891d7a56d2ea Mon Sep 17 00:00:00 2001
From: "G. Branden Robinson" <g.branden.robinson@xxxxxxxxx>
Date: Fri, 28 Jul 2023 12:28:06 -0500
Subject: [PATCH 6/6] man.7: ffix
The `\c` escape sequence works in an argument to a macro call that is
part of a paragraph tag with font style alternation macros, but not the
ordinary font macros `B` and `I`. This is because `TP`, `B`, and `I`
all set up input traps; the six font style alternation macros do not.
The old formatting would, for some versions of some formatters, set the
"[trailer]" text as part of the paragraph body, not the tag--like this.
.UE [trailer] Terminate the link text of the preceding .UR
macro, with the optional trailer (if present, usually a
(and so on)
This was a poorly understood--and undocumented--interaction of man(7)
features until recently. Gory details involving nroff on Unix Version 7
(1979) running on a simulated PDP-11/45 are available.[1]
Here is a comparison of the former and new markup.
before
------
groff 1.22.3: BAD
groff 1.22.4: GOOD
groff 1.23.0: BAD
mandoc 1.14.6: BAD
now
---
groff 1.22.3: BAD
groff 1.22.4: GOOD
groff 1.23.0: GOOD
mandoc 1.14.6: GOOD
[1] https://savannah.gnu.org/bugs/?51468
https://lists.gnu.org/archive/html/groff/2022-06/msg00020.html
Signed-off-by: G. Branden Robinson <g.branden.robinson@xxxxxxxxx>
---
man7/man.7 | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/man7/man.7 b/man7/man.7
index 258ce25da..583fe354f 100644
--- a/man7/man.7
+++ b/man7/man.7
@@ -249,7 +249,7 @@ .SS Hypertext link macros
.B .UE
macro as the link text.
.TP
-.B .UE \c
+.BR .UE \~\c
.RI [ trailer ]
Terminate the link text of the preceding
.B .UR
--
2.30.2
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