rails/rails — pull request #8339 by latortuga (2012-11-27 15:37:00+00:00)
Title: Cache digest opt out cleanup

Per original discussion in [this thread](https://github.com/rails/rails/pull/8317) with @carlosantoniodasilva and @rafaelfranca, I have cleaned up the `CacheHelper` changes and added a CHANGELOG. I couldn't figure out how to add to the closed PR so I made a new one - hope that's okay!