'list_filter works with two-characters long field names (#16080).'

def test_two_characters_long_field(self):

    modeladmin = BookAdmin(Book, site)
    request = self.request_factory.get('/', {'no': '207'})
    changelist = self.get_changelist(request, Book, modeladmin)
    queryset = changelist.get_queryset(request)
    self.assertEqual(list(queryset), [self.bio_book])
    filterspec = changelist.get_filters(request)[0][(-1)]
    self.assertEqual(filterspec.title, 'number')
    choices = list(filterspec.choices(changelist))
    self.assertIs(choices[2]['selected'], True)
    self.assertEqual(choices[2]['query_string'], '?no=207')
