[3.1.0] [BACKPORT] Fix bug with comments in styles, and some associated issues

- Restore printTokens()

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1570 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/Lexer.php

@@ -112,7 +112,6 @@ class HTMLPurifier_Lexer
             case 'DirectLex':
                 return new HTMLPurifier_Lexer_DirectLex();
             case 'PH5P':
-                // experimental Lexer that must be manually included
                 return new HTMLPurifier_Lexer_PH5P();
             default:
                 trigger_error("Cannot instantiate unrecognized Lexer type " . htmlspecialchars($lexer), E_USER_ERROR);