PEP8 cleanup

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

tests/model_fields/tests.py

@@ -133,6 +133,7 @@ class DecimalFieldTests(test.TestCase):
         # This should not crash. That counts as a win for our purposes.
         Foo.objects.filter(d__gte=100000000000)
 
+
 class ForeignKeyTests(test.TestCase):
     def test_callable_default(self):
         """Test the use of a lazy callable for ForeignKey.default"""
@@ -140,6 +141,7 @@ class ForeignKeyTests(test.TestCase):
         b = Bar.objects.create(b="bcd")
         self.assertEqual(b.a, a)
 
+
 class DateTimeFieldTests(unittest.TestCase):
     def test_datetimefield_to_python_usecs(self):
         """DateTimeField.to_python should support usecs"""
@@ -157,6 +159,7 @@ class DateTimeFieldTests(unittest.TestCase):
         self.assertEqual(f.to_python('01:02:03.999999'),
                          datetime.time(1, 2, 3, 999999))
 
+
 class BooleanFieldTests(unittest.TestCase):
     def _test_get_db_prep_lookup(self, f):
         from django.db import connection
@@ -294,6 +297,7 @@ class BooleanFieldTests(unittest.TestCase):
         self.assertIsNone(nb.nbfield)
         nb.save()           # no error
 
+
 class ChoicesTests(test.TestCase):
     def test_choices_and_field_display(self):
         """
@@ -306,6 +310,7 @@ class ChoicesTests(test.TestCase):
         self.assertEqual(Whiz(c=None).get_c_display(), None)    # Blank value
         self.assertEqual(Whiz(c='').get_c_display(), '')        # Empty value
 
+
 class SlugFieldTests(test.TestCase):
     def test_slugfield_max_length(self):
         """
@@ -409,6 +414,7 @@ class BigIntegerFieldTests(test.TestCase):
         b = BigInt.objects.get(value='10')
         self.assertEqual(b.value, 10)
 
+
 class TypeCoercionTests(test.TestCase):
     """
     Test that database lookups can accept the wrong types and convert
@@ -422,6 +428,7 @@ class TypeCoercionTests(test.TestCase):
     def test_lookup_integer_in_textfield(self):
         self.assertEqual(Post.objects.filter(body=24).count(), 0)
 
+
 class FileFieldTests(unittest.TestCase):
     def test_clearable(self):
         """
@@ -496,6 +503,7 @@ class BinaryFieldTests(test.TestCase):
         dm = DataModel(short_data=self.binary_data * 4)
         self.assertRaises(ValidationError, dm.full_clean)
 
+
 class GenericIPAddressFieldTests(test.TestCase):
     def test_genericipaddressfield_formfield_protocol(self):
         """