def describe(self, schema=None):
        """Provide a textual description of the step function/matcher object.

        :param schema:  Text schema to use.
        :return: Textual description of this step definition (matcher).
        """
        step_type = self.step_type or "step"
        if not schema:
            schema = self.schema
        return (step_type, self.string) % schema
dataset/ETHPy150Open behave/behave/behave/matchers.py/Matcher.describe/swapped operands of `%`