Fixed a small collection of flake8 violations that had snuck in

django/contrib/contenttypes/__init__.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from django.contrib.contenttypes.checks  import check_generic_foreign_keys
+from django.contrib.contenttypes.checks import check_generic_foreign_keys
 from django.core import checks
 
 

django/db/models/fields/related.py

@@ -18,7 +18,6 @@
 from django.utils.translation import ugettext_lazy as _
 from django.utils.functional import curry, cached_property
 from django.core import exceptions
-from django.apps import apps
 from django import forms
 
 RECURSIVE_RELATIONSHIP_CONSTANT = 'self'

tests/migrations/test_operations.py

@@ -218,7 +218,7 @@ def test_add_field_preserve_default(self):
         self.assertEqual(field.default, NOT_PROVIDED)
         # Test the database alteration
         project_state.render().get_model("test_adflpd", "pony").objects.create(
-            weight = 4,
+            weight=4,
         )
         self.assertColumnNotExists("test_adflpd_pony", "height")
         with connection.schema_editor() as editor:

tests/migrations/test_state.py

@@ -35,6 +35,7 @@ class Meta:
 
         class SubAuthor(Author):
             width = models.FloatField(null=True)
+
             class Meta:
                 app_label = "migrations"
                 apps = new_apps