Fix for incorrect center tags

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code@9958 5227b50d-9349-4574-b055-4b0a7525e11c
better regex to cover all cases of incorrect closing html tags

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code@9959 5227b50d-9349-4574-b055-4b0a7525e11c