In diagnostics, when directory is not writable, also hint to the user to set permissions.
In diagnostics, when directory is not writable, also hint to the user to set permissions.

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