diagnostic: check all tap branches, not just core
diagnostic: check all tap branches, not just core

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