Fixed some flake8 issues

tests/admin_ordering/tests.py

@@ -156,6 +156,7 @@ class TestRelatedFieldsAdminOrdering(TestCase):
                 if db_field.name == 'band':
                     kwargs["queryset"] = Band.objects.filter(rank__gt=2)
                 return super(SongAdmin, self).formfield_for_foreignkey(db_field, **kwargs)
+
             def formfield_for_manytomany(self, db_field, **kwargs):
                 if db_field.name == 'other_interpreters':
                     kwargs["queryset"] = Band.objects.filter(rank__gt=2)

tests/cache/tests.py

@@ -21,8 +21,7 @@ from django.core.cache.backends.base import (CacheKeyWarning,
     InvalidCacheBackendError)
 from django.db import connection, router, transaction
 from django.core.cache.utils import make_template_fragment_key
-from django.http import (HttpResponse, HttpRequest, StreamingHttpResponse,
+from django.http import HttpResponse, StreamingHttpResponse
-    QueryDict)
 from django.middleware.cache import (FetchFromCacheMiddleware,
     UpdateCacheMiddleware, CacheMiddleware)
 from django.template import Template

tests/inline_formsets/tests.py

@@ -162,7 +162,7 @@ class InlineFormsetFactoryTest(TestCase):
     def test_zero_primary_key(self):
         # Regression test for #21472
         poet = Poet.objects.create(id=0, name='test')
-        poem = poet.poem_set.create(name='test poem')
+        poet.poem_set.create(name='test poem')
         PoemFormSet = inlineformset_factory(Poet, Poem, fields="__all__", extra=0)
         formset = PoemFormSet(None, instance=poet)
         self.assertEqual(len(formset.forms), 1)