Fixed #17643 -- Set a better stack level for the cache_page decorator deprecation warnings. Thanks, zsiciarz.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17484 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/views/decorators/cache.py

@@ -44,7 +44,8 @@ def cache_page(*args, **kwargs):
         warnings.warn('The cache_page decorator must be called like: '
                       'cache_page(timeout, [cache=cache name], [key_prefix=key prefix]). '
                       'All other ways are deprecated.',
-                      PendingDeprecationWarning)
+                      PendingDeprecationWarning,
+                      stacklevel=3)
 
     if len(args) > 1:
         assert len(args) == 2, "cache_page accepts at most 2 arguments"