[man pages]: Migrate man(7) cross refs to `MR`.

 # Handle simplest case: ".IR foo (1)".
s/^.[BI]R \(\\%\)*\([@_[:alnum:]\\-]\+\) (\(@MAN[157]EXT@\))$/.MR \2 \3/
s/^.[BI]R \(\\%\)*\([@_[:alnum:]\\-]\+\) (\([1-8a-z]\+\))$/.MR \2 \3/
 # Handle case: trailing puncutation, e.g., ".IR foo (1),".
s/^.[BI]R \(\\%\)*\([@_[:alnum:]\\-]\+\) (\(@MAN[157]EXT@\))\([^[:space:]]\+\)/.MR \2 \3 \4/
s/^.[BI]R \(\\%\)*\([@_[:alnum:]\\-]\+\) (\([1-8a-z]\+\))\([^[:space:]]\+\)/.MR \2 \3 \4/
 # Handle case: 3rd+ arguments or trailing comments.  This case is rare
 # and will require manual fixup if there are 4+ arguments to MR.  Use
 # groff -man -rCHECKSTYLE=1 to have them automatically reported.
s/^.[BI]R \(\\%\)*\([@_[:alnum:]\\-]\+\) (\(@MAN[157]EXT@\))\( .*\)/.MR \2 \3\4/
s/^.[BI]R \(\\%\)*\([@_[:alnum:]\\-]\+\) (\([1-8a-z]\+\))\( .*\)/.MR \2 \3\4/

1 files changed, 7 insertions, 7 deletions

diff --git a/contrib/gdiffmk/gdiffmk.1.man b/contrib/gdiffmk/gdiffmk.1.man
index f61331978..9c9d1f936 100644
--- a/contrib/gdiffmk/gdiffmk.1.man
+++ b/contrib/gdiffmk/gdiffmk.1.man
@@ -72,7 +72,7 @@ gdiffmk \- mark differences between groff/nroff/troff files
 .
 .I gdiffmk
 compares two
-.IR roff (@MAN7EXT@)
+.MR roff @MAN7EXT@
 documents,
 .I file1
 and
@@ -199,7 +199,7 @@ and
 In particular,
 .I diff-command
 should accept the GNU
-.IR diff (1)
+.MR diff 1
 .B \-D
 option.
 .
@@ -258,11 +258,11 @@ Mike Bianchi
 .SH "See also"
 .\" ====================================================================
 .
-.IR groff (@MAN1EXT@),
-.IR nroff (@MAN1EXT@),
-.IR gtroff (@MAN1EXT@),
-.IR roff (@MAN7EXT@),
-.IR diff (@MAN1EXT@)
+.MR groff @MAN1EXT@ ,
+.MR nroff @MAN1EXT@ ,
+.MR gtroff @MAN1EXT@ ,
+.MR roff @MAN7EXT@ ,
+.MR diff @MAN1EXT@
 .
 .
 .\" Restore compatibility mode (for, e.g., Solaris 10/11).