You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: gnu-units.rb
    path of file: ./repos/homebrew-core/Formula/g
    
    the code of the file until where you have to start completion: class GnuUnits
    
  def caveats
    on_macos do
      <<~EOS
        All commands have been installed with the prefix "g".
        If you need to use these commands with their normal names, you
        can add a "gnubin" directory to your PATH from your bashrc like:
          PATH="#{opt_libexec}/gnubin:$PATH"
      EOS
    end
  end