rails/rails — pull request #12353 by carlosparamio (2013-09-25 07:34:32+00:00)
Title: Declare block as optional parameter on instrument method to highlight that possibility

The arguments on the instrument method don't clarify that it is possible to pass a block to it. The previous examples at the ActiveSupport::Notifications class shows it, but the actual method declaration doesn't. I added it for consistency with the other methods.