rails/rails — pull request #6859 by bogdan (2012-06-26 06:25:13+00:00)
Title: AS::Callbacks: deprecate monkey patch code

Deprecate usage of filter object with #before and #after
methods as around callback.

There is some code monkey patches objects passed to `set_callback` method. This should never happen.
The only one usage of this is found in `ActionController::Caching::Sweeper` which is easy to fix.