def test_changeVersionsWithPrerelease(self):
        self._testVersionChanging(True, False)
`parser` should be ``None``.
dataset/ETHPy150Open twisted/twisted/twisted/python/test/test_release.py/ScriptTests.test_changeVersionsWithPrerelease--crossover with--dataset/ETHPy150Open adieu/allbuttonspressed/docutils/readers/pep.py/Reader.__init__