a = r'(         : entity.name.tag.named.group.regexp, meta.named.regexp, source.python, string.regexp.quoted.single.python
\"            : constant.character.escape.regexp, meta.named.regexp, source.python, string.regexp.quoted.single.python
 for          : meta.named.regexp, source.python, string.regexp.quoted.single.python
              : invalid.illegal.newline.python, source.python, string.regexp.quoted.single.python
a             : source.python
              : source.python
=             : keyword.operator.assignment.python, source.python
              : source.python
r             : source.python, storage.type.string.python, string.regexp.quoted.single.python
'             : punctuation.definition.string.begin.python, source.python, string.regexp.quoted.single.python
(             : keyword.operator.lookbehind.negative.regexp, punctuation.parenthesis.lookbehind.begin.regexp, source.python, string.regexp.quoted.single.python
?