PEP8 cleanup

Signed-off-by: Jason Myers <jason@jasonamyers.com>

tests/generic_relations/tests.py

@@ -290,12 +290,14 @@ class GenericRelationsTests(TestCase):
 class CustomWidget(forms.TextInput):
     pass
 
+
 class TaggedItemForm(forms.ModelForm):
     class Meta:
         model = TaggedItem
         fields = '__all__'
         widgets = {'tag': CustomWidget}
 
+
 class GenericInlineFormsetTest(TestCase):
     def test_generic_inlineformset_factory(self):
         """