[PATCH] man pages: define consistent fallback strings for lq and dq

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Subject: [PATCH] man pages: define consistent fallback strings for lq and dq
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[please CC me on replies, as I am not subscribed to bug-rcs@gnu]

Context: https://lists.gnu.org/archive/html/bug-gawk/2025-03/msg00026.html

In rcs(1), define fallbacks for *roff strings `lq` and `rq` the same way
GNU gawk and GNU grep do.  Also do this in the co(1) man page, since it
employs those strings.

The `lq` and `rq` strings are not a groffism, but originate in 4BSD
(1980).[1]  They entered Unix System V with SVR4 (1988 or 1989).[2]
mandoc(1) has supported them since its inception.[3]

Plan 9 troff is the only implementation I know of that doesn't define
these strings in its man(7) package; I am preparing a patch for Plan 9
=66rom User Space, a.k.a. "plan9port".

[1] https://minnie.tuhs.org/cgi-bin/utree.pl?file=3D4BSD/usr/lib/tmac/tmac.=
an.new
[2]
https://github.com/ryanwoodsmall/oldsysv/blob/e68293af91e2dc39f5f29c20d7e42=
9f9e0cabc75/sysvr4/svr4/ucbcmd/troff/troff.d/tmac.d/an#L46
[3] https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/mandoc/predefs.in=
?rev=3D1.1&content-type=3Dtext/x-cvsweb-markup

Patch attached.

Regards,
Branden

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diff --git a/man/co.1in b/man/co.1in
index 7adb208..381af25 100644
--- a/man/co.1in
+++ b/man/co.1in
@@ -2,6 +2,17 @@
 .so b-base
 .if n .ds - \%--
 .if t .ds - \(em
+.if !\w@\*(lq@ \{\
+.\" The implementation doesn't seem to support the strings `lq` or `rq`.
+.	ie \n(.g \{\
+.		ds lq \(lq\"
+.		ds rq \(rq\"
+.	\}
+.	el \{\
+.		ds lq ``
+.		ds rq ''
+.	\}
+.\}
 .TH CO 1 "\*(Dt" "GNU RCS \*(Rv"
 .SH NAME
 co \- check out RCS revisions
diff --git a/man/rcs.1in b/man/rcs.1in
index 76b2107..8a8bce8 100644
--- a/man/rcs.1in
+++ b/man/rcs.1in
@@ -2,14 +2,15 @@
 .so b-base
 .if n .ds - \%--
 .if t .ds - \(em
-.if !\n(.g \{\
-.	if !\w|\*(lq| \{\
-.		ds lq ``
-.		if \w'\(lq' .ds lq "\(lq
+.if !\w@\*(lq@ \{\
+.\" The implementation doesn't seem to support the strings `lq` or `rq`.
+.	ie \n(.g \{\
+.		ds lq \(lq\"
+.		ds rq \(rq\"
 .	\}
-.	if !\w|\*(rq| \{\
+.	el \{\
+.		ds lq ``
 .		ds rq ''
-.		if \w'\(rq' .ds rq "\(rq
 .	\}
 .\}
 .TH RCS 1 "\*(Dt" "GNU RCS \*(Rv"

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