man: Mark --format values in bold

debian/changelog

@@ -116,6 +116,7 @@ dpkg (1.18.0) UNRELEASED; urgency=low
   * Improve dselect color-spec --help output.
   * Document dselect -? option.
   * Capitalize dpkg-parsechangelog(1) option descriptions.
+  * Mark dpkg-parsechangelog(1) --format values in bold.
 
   [ Raphaël Hertzog ]
   * Drop myself from Uploaders.

man/dpkg-parsechangelog.1

@@ -78,8 +78,8 @@ of using the name from the \fB\-\-file\fP option, or its default value.
 .TP
 .BI \-\-format " output-format"
 Set the output format. Currently supported values are
-.IR dpkg " and " rfc822 .
-\fIdpkg\fP is the classic output format (from before this
+.BR dpkg " and " rfc822 .
+\fBdpkg\fP is the classic output format (from before this
 option existed) and the default. It consists of one paragraph
 in Debian control format (see \fBdeb\-control\fP(5)). If more
 than one entry is requested, then most fields are taken from the