new (Gem::CommandManager)

    # File lib/rubygems/command_manager.rb, line 25
        def initialize
          @commands = {}
          register_command :build
          register_command :cert
          register_command :check
          register_command :cleanup
          register_command :contents
          register_command :dependency
          register_command :environment
          register_command :fetch
          register_command :generate_index
          register_command :help
          register_command :install
          register_command :list
          register_command :lock
          register_command :mirror
          register_command :outdated
          register_command :pristine
          register_command :query
          register_command :rdoc
          register_command :search
          register_command :server
          register_command :sources
          register_command :specification
          register_command :stale
          register_command :uninstall
          register_command :unpack
          register_command :update
          register_command :which
        end