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: ksh93.rb
    path of file: ./repos/homebrew-core/Formula/k
    
    the code of the file until where you have to start completion: class Ksh93 < 
    
  def install
    system "bin/package", "verbose", "make"
    system "bin/package", "verbose", "install", prefix
    %w[ksh93 rksh rksh93].each do |alt|
      bin.install_symlink "ksh" => alt
      man1.install_symlink "ksh.1" => "#{alt}.1"
    end
    doc.install "ANNOUNCE"
    doc.install %w[COMPATIBILITY README RELEASE TYPES].map { |f| "src/cmd/ksh93/#{f}" }
  end