Add a patch to fix a minor bug in doc/trader.6

debian/changelog

@@ -6,6 +6,7 @@ trader (7.20-2) unstable; urgency=low
   * Incorporates changes made to previous upstream release (not uploaded
     to Debian): new Polish, Romanian and Ukrainian translations, renamed
     AppStream metainfo and desktop files.
+  * Added debian/patches/0001-man-page-bug-fix.patch.
   * Removed version numbers on build dependencies for Automake and
     Gettext: oldstable already has at least the required versions.
   * Changed Vcs-Git link to use HTTPS instead of Git protocol.

debian/patches/0001-man-page-bug-fix.patch

@@ -0,0 +1,21 @@
+From: John Zaitseff <J.Zaitseff@zap.org.au>
+Date: Wed, 28 Feb 2024 10:21:23 +1100
+Subject: Minor bug fix in doc/trader.6: remove undefined mR font invocation
+
+---
+ doc/trader.6 | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/doc/trader.6 b/doc/trader.6
+index 5281a70..e3eae34 100644
+--- a/doc/trader.6
++++ b/doc/trader.6
+@@ -52,7 +52,7 @@
+ .ft \\*(mC
+ ..
+ .de ECEX
+-.ft \\*(mR
++.ft
+ .ad
+ .hy 14
+ .sp

debian/patches/series

@@ -0,0 +1 @@
+0001-man-page-bug-fix.patch