Homebrew/homebrew — pull request #31095 by staticfloat (2014-07-24 18:11:13+00:00)
Title: Allow `--quiet` to silence tap failures

This is nice because for things like Julia, where we use Homebrew for providing binary dependencies and have a tap full of alternate, tweaked versions of mainline formulae (usually just so that they are `Cellar :any`-compatible) we don't want to blurt out all the tapping failures.