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: redpen.rb
    path of file: ./repos/homebrew-core/Formula/r
    
    the code of the file until where you have to start completion: class Redpen < Formula
  desc "Proofreading tool to help writers of technical documentation"
  homepage "https://redpen.
    
  def install
    # Don't need Windows files.
    rm_f Dir["bin/*.bat"]
    libexec.install %w[conf lib sample-doc js]

    prefix.install "bin"
    env = Language::Java.java_home_env("11")
    env["PATH"] = "$JAVA_HOME/bin:$PATH"
    bin.env_script_all_files libexec/"bin", env
  end