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: chocolate-doom.rb
    path of file: ./repos/homebrew-core/Formula/c
    
    the code of the file until where you have to start completion: class Chocolat
    
  def caveats
    <<~EOS
      Note that this formula only installs a Doom game engine, and no
      actual levels. The original Doom levels are still under copyright,
      so you can copy them over and play them if you already own them.
      Otherwise, there are tons of free levels available online.
      Try starting here:
        #{homepage}
    EOS
  end