search: split missing formula help into its own method
search: split missing formula help into its own method

MikeMcQuaid/brew,MikeMcQuaid/brew,nandub/brew,Homebrew/brew,MikeMcQuaid/brew,Homebrew/brew,JCount/brew,JCount/brew,nandub/brew,nandub/brew,JCount/brew,MikeMcQuaid/brew,JCount/brew,Homebrew/brew,Homebrew/brew,nandub/brew