def test_multiline_message(self):
        actual = make_usage_error("foo\nfoo", "--help")
        self.assertStartsWith(actual, "Command-line usage error:")

# TODO: add more tests for this.
Create a :class:`._Dispatch` class corresponding to an
dataset/ETHPy150Open cjerdonek/open-rcv/openrcv/test/scripts/test_run.py/MakeUsageErrorTest.test_multiline_message--crossover with--dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/event/base.py/_create_dispatcher_class