PEP-8 cleanup

Refs #21169

tests/custom_managers/models.py

@@ -117,6 +117,7 @@ class FunPerson(models.Model):
     def __str__(self):
         return "%s %s" % (self.first_name, self.last_name)
 
+
 @python_2_unicode_compatible
 class Book(models.Model):
     title = models.CharField(max_length=50)

tests/custom_managers/tests.py

@@ -448,7 +448,6 @@ class CustomManagerTests(TestCase):
         )
         self.b1.authors.add(droopy)
 
-
         # Check that the fun manager ONLY clears fun people.
         self.b1.authors(manager='fun_people').clear()
         self.assertQuerysetEqual(