code: def t_istringapostrophe_css_string(self, t):
          r'[^\'@]+'
          t.lexer.lineno += t.value.count('\n')
          return f t_istringapostrophe_css_string(self, t):
          r'[^\'@]+'
          t.lexer.lineno += t.value.count('\n')
          return t
docs: r'[^\'@]+