[PATCH 4/3] gitweb: Use light/dark class also in 'blame' view

[Jakub Narebski <jnareb@gmail.com>]

Instead of using "light2" and "dark2" for class names in 'blame' view
(in place of "light" and "dark" classes in other places) to avoid
changing style on hover in 'blame' view while doing it for other views
(like 'shortlog'), use more advanced CSS, relying on the fact that
more specific selector wins.

While at it add a few comments to gitweb CSS file, and consolidate
some repeated info.

Signed-off-by: Jakub Narebski <jnareb@gmail.com>
---
This is an RFC because 

1. I am not sure if I did it correctly.  I had to fiddle a bit with CSS
(using "table.blame .light:hover" in place of "table.blame tr.light:hover")
to get the same behaviour (well, the same as far as I have checked it).

2. Commit message could use improvements (single sentence, blergh).

 gitweb/gitweb.css  |   16 +++++++++-------
 gitweb/gitweb.perl |    2 +-
 2 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/gitweb/gitweb.css b/gitweb/gitweb.css
index 5e2f629..4e4f8aa 100644
--- a/gitweb/gitweb.css
+++ b/gitweb/gitweb.css
@@ -226,22 +226,24 @@ th {
 	text-align: left;
 }
 
-tr.light:hover {
-	background-color: #edece6;
-}
-
-tr.dark {
-	background-color: #f6f6f0;
+/* do not change row style on hover for 'blame' view */
+tr.light,
+table.blame .light:hover {
+	background-color: #ffffff;
 }
 
-tr.dark2 {
+tr.dark,
+table.blame .dark:hover {
 	background-color: #f6f6f0;
 }
 
+/* currently both use the same, but it can change */
+tr.light:hover,
 tr.dark:hover {
 	background-color: #edece6;
 }
 
+/* boundary commits in 'blame' view */
 tr.boundary td.sha1 {
 	font-weight: bold;
 }
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 5336c92..bb7a5a9 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -4811,7 +4811,7 @@ sub git_blame {
 	git_print_page_path($file_name, $ftype, $hash_base);
 
 	# page body
-	my @rev_color = qw(light2 dark2);
+	my @rev_color = qw(light dark);
 	my $num_colors = scalar(@rev_color);
 	my $current_color = 0;
 	my %metainfo = ();
-- 
1.6.3.3