def test_write_stringio(self):

            self._test_write_string_bytes_io(StringIO.StringIO())
Extend an 'or_expr' by adding one more check.
dataset/ETHPy150Open spacetelescope/PyFITS/pyfits/tests/test_core.py/TestFileFunctions.test_write_stringio--crossover with--dataset/ETHPy150Open CiscoSystems/avos/openstack_dashboard/openstack/common/policy.py/ParseState._extend_or_expr