def __str__(self):
        """
        Dump the errors in a pretty way in the event of a subprocess traceback.
        """
        result = b'\n'.join([b''] + list(self.args))
        if _PY3:
            result = repr(result)
        return result

        Dump the errors in a pretty way in the event of a subprocess traceback.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_sendmsg.py