From e5b5757e640371974d2e70144c8e59c6a5b613f6 Mon Sep 17 00:00:00 2001
From: "G. Branden Robinson" <g.branden.robinson@gmail.com>
Date: Sun, 24 Aug 2025 11:53:38 -0500
Subject: tmac/tmac.an*: support `lq`, `rq` strings

The `lq` and `rq` strings are not a groffism, but _almost_ universally
portable to man(7) renderers.

They 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]

* tmac/tmac.an:
* tmac/tmac.antimes: Do it.  Use U+201C and U+201D if the output device
  is "utf", otherwise define them as `` and ''.  Don't define them as
  `"` because that breaks when interpolating the strings in macro
  arguments.[4]

[1] https://minnie.tuhs.org/cgi-bin/utree.pl?file=4BSD/usr/lib/tmac/tmac.an.new
[2]
https://github.com/ryanwoodsmall/oldsysv/blob/e68293af91e2dc39f5f29c20d7e429f9e0cabc75/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=1.1&content-type=text/x-cvsweb-markup
[4] https://www.gnu.org/software/groff/manual/groff.html.node/Calling-Macros.html

   "For the (neutral) double quote, you have recourse to an obscure
   syntactical feature of AT&T troff. ..."
---
 tmac/tmac.an      | 8 ++++++++
 tmac/tmac.antimes | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/tmac/tmac.an b/tmac/tmac.an
index 7948a153..dfd653b2 100644
--- a/tmac/tmac.an
+++ b/tmac/tmac.an
@@ -478,6 +478,8 @@
 .nr )V 11 \}
 .if t \{.ds R ®
 .ds S \s\n()S
+.ds lq “
+.ds rq ”
 ..\}
 .if n \{.ie \nL<=0 .nr )L 11i
 .el \{.nr )L \nLu
@@ -491,6 +493,12 @@
 .nr )O 0\}
 .ds R (Reg.)
 .ds S
+.ds lq ``
+.ds rq ''
+.\" Insert definitions for non-utf troff-mode devices here.
+.if '\*(.T'utf' \{.ds lq “
+.ds rq ”
+.\}
 ..\}
 .if \nT .nr LL 80n
 .if \nV>1 \{
diff --git a/tmac/tmac.antimes b/tmac/tmac.antimes
index 123ea514..b2843713 100644
--- a/tmac/tmac.antimes
+++ b/tmac/tmac.antimes
@@ -450,6 +450,8 @@
 .nr)V 12 \}
 .ift \{.ds R \(rg
 .dsS \s\n()S
+.ds lq “
+.ds rq ”
 ..\}
 .ifn \{.nr )L 11i
 .nrLL 6.5i
@@ -461,6 +463,12 @@
 .nr)O 0\}
 .dsR (Reg.)
 .dsS
+.ds lq ``
+.ds rq ''
+.\" Insert definitions for non-utf troff-mode devices here.
+.if '\*(.T'utf' \{.ds lq “
+.ds rq ”
+.\}
 ..\}
 .if\nT .nr LL 80n
 .if\nV>1 \{
-- 
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