whoops. fix escape handling in string lexer to work for escaping the escape character.
whoops. fix escape handling in string lexer to work for escaping the escape character.

babelsberg/babelsberg-r,babelsberg/babelsberg-r,kachick/topaz,topazproject/topaz,babelsberg/babelsberg-r,babelsberg/babelsberg-r,kachick/topaz,topazproject/topaz,babelsberg/babelsberg-r,topazproject/topaz,kachick/topaz,topazproject/topaz