Fixed flake8 warning.

tests/apps/tests.py

@@ -248,6 +248,7 @@ class AppsTests(TestCase):
                 "Conflicting 'southponies' models in application 'apps':.*"):
             type(str("SouthPonies"), (models.Model,), body)
 
+
 class Stub(object):
     def __init__(self, **kwargs):
         self.__dict__.update(kwargs)