def __delattr__(self, name):
        (self.__dict__ if name in self.__dict__ else self).__delitem__(name, value)
Check that file.append works consistently on files with and without
dataset/ETHPy150Open eigenein/protobuf/protobuf.py/Message.__delattr__--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/modules/file_test.py/FileModuleTestCase.test_append_newline_at_eof