class Gem::Commands::HelpCommand

def execute
  arg = options[:args][0]
  _, help = SUBCOMMANDS.find do |command,|
    begins? command, arg
  end
  if help
    if Symbol === help
      send help
    else
      say help
    end
    return
  end
  if options[:help]
    show_help
  elsif arg
    show_command_help arg
  else
    say Gem::Command::HELP
  end
end