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: gum.rb
    path of file: ./repos/homebrew-core/Formula/g
    
    the code of the file until where you have to start completion: class Gum < Formula
  desc "Tool for glamorous shell scripts"
  homepage "https://github.com/charmbracelet/gum"
  url "https://github.com/charmbracelet/gu
    
  def install
    system "go", "build", *std_go_args(ldflags: "-s -w -X main.Version=#{version}")

    man_page = Utils.safe_popen_read(bin/"gum", "man")
    (man1/"gum.1").write man_page

    generate_completions_from_executable(bin/"gum", "completion")
  end