flake8 tests missing from tox (django-json-api#436)

Author: n2ygk

example/tests/unit/test_pagination.py

@@ -87,7 +87,7 @@ def test_limit_offset_deprecation(self):
 
 
 # TODO: This test fails under py27 but it's not clear why so just leave it out for now.
-@pytest.mark.xfail((sys.version_info.major, sys.version_info.minor) == (2,7),
+@pytest.mark.xfail((sys.version_info.major, sys.version_info.minor) == (2, 7),
                    reason="python2.7 fails for unknown reason")
 class TestPageNumber:
     """