rails/rails — pull request #12545 by nateberkopec (2013-10-15 15:05:17+00:00)
Title: Rephrase ActiveRecord transaction rollback warning

The Guide's blurb on causing rollbacks with exceptions was confusing and unclear, causing, I think, #12528.

I have rephrased the warning to make it more clear that exceptions other than ActiveRecord::Rollback with not be rescued by Rails, and that this may cause unexpected behavior.