extend/string: use unless to fix style.
extend/string: use unless to fix style.

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