Changes to be committed:       modified:   Library/Homebrew/cmd/shellenv.sh
Changes to be committed:
      modified:   Library/Homebrew/cmd/shellenv.sh

Prevent overriding default MANPATH while MANPATH is empty.

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