Changes done:
1- Removal of <meta name="flags" content="image" /> lines in reftests
2- Removal of <br /> in tests
3- Addition of margin-top: 10px; into div#reference of tests and into
div of reftests
4- Added a blank space quote ('"') and forward slash ("/") in null end tags;
this was needed to make an advanced search and replace reliable
5- Added <link rel="reviewer" title="Gérard Talbot"
href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<!-- 2013-04-08 --> in tests.

Tests affected by those changes:
background-color-[049|054|070|075|090|095|110|115]

Reference files affected by those changes:
pairs of the reftests of those tests.

Explanations for all these changes:
http://lists.w3.org/Archives/Public/public-css-testsuite/2013Feb/0075.html