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