gitweb: Mark first match when searching commit messages

Due to greediness of a pattern, gitweb used to mark (show) last match
in line, if there are more than one match in line. Now it shows first.
Showing all matches in a line would require further work.

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

gitweb/gitweb.perl

@@ -3837,7 +3837,7 @@ sub git_search_grep_body {
 		              chop_and_escape_str($co{'title'}, 50) . "<br/>");
 		my $comment = $co{'comment'};
 		foreach my $line (@$comment) {
-			if ($line =~ m/^(.*)($search_regexp)(.*)$/i) {
+			if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
 				my ($lead, $match, $trail) = ($1, $2, $3);
 				$match = chop_str($match, 70, 5, 'center');
 				my $contextlen = int((80 - length($match))/2);