new (Gem::Commands::CleanupCommand)

    # File lib/rubygems/commands/cleanup_command.rb, line 8
          def initialize
            super(
              'cleanup',
              'Clean up old versions of installed gems in the local repository',
              {
                :force => false,
                :test => false,
                :install_dir => Gem.dir
              })
            add_option('-d', '--dryrun', "") do |value, options|
              options[:dryrun] = true
            end
          end