class Thor

def command_help(shell, command_name)
  meth = normalize_command_name(command_name)
  command = all_commands[meth]
  handle_no_command_error(meth) unless command
  shell.say "Usage:"
  shell.say "  #{banner(command)}"
  shell.say
  class_options_help(shell, nil => command.options.map { |_, o| o })
  if command.long_description
    shell.say "Description:"
    shell.print_wrapped(command.long_description, :indent => 2)
  else
    shell.say command.description
  end
end