Additional unit tests

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9674 5227b50d-9349-4574-b055-4b0a7525e11c
Performance improvement to WikiRegexes.EmptyLink

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9675 5227b50d-9349-4574-b055-4b0a7525e11c
Performance tweak to FixLinkWhitespace

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9676 5227b50d-9349-4574-b055-4b0a7525e11c
update code comment

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@9677 5227b50d-9349-4574-b055-4b0a7525e11c