Mark SEE ALSO commands with .BR in bzdiff.1, bzgrep.1 and bzmore.1

This makes sure all commands show up as bold in the man pages.

Suggested-by: Helge Kreutzmann <debian@helgefjell.de>
diff --git a/bzdiff.1 b/bzdiff.1
index adb7a8e..f02fa24 100644
--- a/bzdiff.1
+++ b/bzdiff.1
@@ -38,7 +38,12 @@
 .I diff
 is preserved.
 .SH "SEE ALSO"
-cmp(1), diff(1), bzmore(1), bzless(1), bzgrep(1), bzip2(1)
+.BR cmp (1),
+.BR diff (1),
+.BR bzmore (1),
+.BR bzless (1),
+.BR bzgrep (1),
+.BR bzip2 (1)
 .SH BUGS
 Messages from the
 .I cmp
diff --git a/bzgrep.1 b/bzgrep.1
index 930af8c..54bb31f 100644
--- a/bzgrep.1
+++ b/bzgrep.1
@@ -53,4 +53,10 @@
 Charles Levert (charles@comm.polymtl.ca). Adapted to bzip2 by Philippe
 Troin <phil@fifi.org> for Debian GNU/Linux.
 .SH "SEE ALSO"
-grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1)
+.BR grep (1),
+.BR egrep (1),
+.BR fgrep (1),
+.BR bzdiff (1),
+.BR bzmore (1),
+.BR bzless (1),
+.BR bzip2 (1)
diff --git a/bzmore.1 b/bzmore.1
index b437d3b..9850948 100644
--- a/bzmore.1
+++ b/bzmore.1
@@ -149,4 +149,8 @@
 .DT
 /etc/termcap		Terminal data base
 .SH "SEE ALSO"
-more(1), less(1), bzip2(1), bzdiff(1), bzgrep(1)
+.BR more (1),
+.BR less (1),
+.BR bzip2 (1),
+.BR bzdiff (1),
+.BR bzgrep (1)