Whitespace cleanup.

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

tests/cache/liberal_backend.py

@@ -7,4 +7,3 @@ class LiberalKeyValidationMixin(object):
 
 class CacheClass(LiberalKeyValidationMixin, LocMemCache):
     pass
-