pr-pull: preserve trailers when signing off commit
pr-pull: preserve trailers when signing off commit

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