git-format-patch: Use rfc2822 compliant date.

Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

git-format-patch.sh

@@ -205,11 +205,10 @@ sub show_date {
     }
     my $t = $time + $minutes * 60;
     my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday) = gmtime($t);
-    return sprintf("%s %s %d %02d:%02d:%02d %d %+05d",
-		   $weekday_names[$wday],
-		   $month_names[$mon],
-		   $mday, $hour, $min, $sec,
-		   $year+1900, $tz);
+    return sprintf("%s, %d %s %d %02d:%02d:%02d %+05d",
+		   $weekday_names[$wday], $mday,
+		   $month_names[$mon], $year+1900,
+		   $hour, $min, $sec, $tz);
 }
 
 print "From nobody Mon Sep 17 00:00:00 2001\n";