'Regression test for #13963'

def test_related_name(self):

    self.assertEquals(label_for_field('location', Event, return_attr=True), ('location', None))
    self.assertEquals(label_for_field('event', Location, return_attr=True), ('awesome    event', None))
    self.assertEquals(label_for_field('guest', Event, return_attr=True), ('awesome    guest', None))
