[PATCH 2/3] gitweb: Link to 7-character SHA1SUMS in commit messages

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Change the minimum length of a commit we'll link to from 8 to 7.

This arbitrary minimum length of 8 was introduced in
v1.4.4.2-151-gbfe2191, but as seen in e.g. v1.7.4-1-gdce9648 the
default abbreviation length is 7.

It's still possible to reference SHA1s down to 4 characters in length,
see v1.7.4-1-gdce9648's MINIMUM_ABBREV, but I can't see how to make
git actually produce that, so I doubt anyone is putting that into log
messages in practice, but people definitely do put 7 character SHA1s
into log messages.

I think it's fairly dubious to link to things matching [0-9a-fA-F]
here as opposed to just [0-9a-f], that dates back to the initial
version of gitweb from 161332a. Git will accept all-caps SHA1s, but
didn't ever produce them as far as I can tell.
---
 gitweb/gitweb.perl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 9473daf..101dbc0 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -2036,7 +2036,7 @@ sub format_log_line_html {
 	my $line = shift;
 
 	$line = esc_html($line, -nbsp=>1);
-	$line =~ s{\b([0-9a-fA-F]{8,40})\b}{
+	$line =~ s{\b([0-9a-fA-F]{7,40})\b}{
 		$cgi->a({-href => href(action=>"object", hash=>$1),
 					-class => "text"}, $1);
 	}eg;
-- 
2.1.3