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 patch is identical to previous version (patch 4/3 in previous
version of this series).

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  |   17 ++++++++++-------
 gitweb/gitweb.perl |    2 +-
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/gitweb/gitweb.css b/gitweb/gitweb.css
index 4763337..8f68fe3 100644
--- a/gitweb/gitweb.css
+++ b/gitweb/gitweb.css
@@ -226,22 +226,25 @@ 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 */
+/* and commits without "previous" */
 tr.boundary td.sha1,
 tr.no-previous td.linenr {
 	font-weight: bold;
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index ea1ab5f..2cb60be 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -4801,7 +4801,7 @@ 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

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