maint: update update-copyright for Emacs

* build-aux/update-copyright: Add support for Emacs, which
uses file names like Changelog.1 that are not man pages,
and file names like emacs.1.in that are man page templates.

ChangeLog

@@ -1,3 +1,10 @@
+2024-12-31  Paul Eggert  <[email protected]>
+
+	maint: update update-copyright for Emacs
+	* build-aux/update-copyright: Add support for Emacs, which
+	uses file names like Changelog.1 that are not man pages,
+	and file names like emacs.1.in that are man page templates.
+
 2024-12-31  Collin Funk  <[email protected]>
 
 	servent tests: Fix failure due to missing htons declaration.

build-aux/update-copyright

@@ -138,7 +138,7 @@
 eval 'exec perl -wSx -0777 -pi "$0" "$@"'
      if 0;
 
-my $VERSION = '2024-07-04.10:56'; # UTC
+my $VERSION = '2025-01-01.07:36'; # UTC
 # The definition above must lie within the first 8 lines in order
 # for the Emacs time-stamp write hook (at end) to update it.
 # If you change this file with Emacs, please let the write hook
@@ -235,7 +235,7 @@ while (/(^|\n)(.{0,$prefix_max})$copyright_re/cg)
             else
               {
                 my $ndash = ($ARGV =~ /\.tex(i(nfo)?)?$/ ? "--"
-                             : $ARGV =~ /\.(\d[a-z]*|man)$/ ? "\\(en"
+                             : $ARGV =~ /\.(\d[a-z]*|man)(\.in)?$/ && $ARGV !~ /ChangeLog\./ ? "\\(en"
                              : "-");
 
                 $stmt =~