Whitespace cleanup.

* Removed trailing whitespace.
* Added newline to EOF if missing.
* Removed blank lines at EOF.
* Removed some stray tabs.

tests/known_related_objects/models.py

@@ -20,4 +20,3 @@ class Pool(models.Model):
 class PoolStyle(models.Model):
     name = models.CharField(max_length=30)
     pool = models.OneToOneField(Pool)
-