style: output warnings on debug/verbose.
style: output warnings on debug/verbose.

Otherwise this will hide actual errors.

nandub/brew,sjackman/homebrew,MikeMcQuaid/brew,Homebrew/brew,Homebrew/brew,vitorgalvao/brew,claui/brew,MikeMcQuaid/brew,MikeMcQuaid/brew,EricFromCanada/brew,vitorgalvao/brew,EricFromCanada/brew,sjackman/homebrew,nandub/brew,EricFromCanada/brew,EricFromCanada/brew,claui/brew,sjackman/homebrew,vitorgalvao/brew,JCount/brew,MikeMcQuaid/brew,nandub/brew,JCount/brew,vitorgalvao/brew,claui/brew,nandub/brew,Homebrew/brew,sjackman/homebrew,JCount/brew,claui/brew,JCount/brew,Homebrew/brew