Class selectors do not work when whitespace is not just spaces.

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Get HtmlDocument from http://shoryuken.com/forum/index.php?events/monthly
2. Use `document.CssSelect("td.primaryContent.weekends.nowWeek.nowToday")

What is the expected output? What do you see instead?

I expect one TD element to be returned.  However, there are tabs, carriage 
returns, and linefeeds in the class attribute on the tag, and only the first 
class selector (td.primaryContent) works.

What version of the product are you using? On what operating system?

1.0.0.0 - Windows 7
Please provide any additional information below.

Original issue reported on code.google.com by casper...@caspershouse.com on 20 May 2012 at 7:48