wdired autoload instructions

[Deniz Dogan <deniz@dogan.se>]

I read the following in wdired.el:

;; This is the recommended way for faster Emacs startup time and lower
;; memory consumption:
;;
;; (autoload 'wdired-change-to-wdired-mode "wdired")
;; (eval-after-load "dired"
;;           '(lambda ()
;;              (define-key dired-mode-map "r" 
'wdired-change-to-wdired-mode)
;;              (define-key dired-mode-map
;;                [menu-bar immediate wdired-change-to-wdired-mode]
;;                '("Edit File Names" . wdired-change-to-wdired-mode))))

This is what I put in my init file:

(autoload 'wdired-change-to-wdired-mode "wdired")
(eval-after-load "dired"
   '(lambda ()
      (define-key dired-mode-map "r" 'wdired-change-to-wdired-mode)))

Now when I start dired, "r" is still undefined and
`wdired-changeto-wdired-mode' is not recognized as a command (but is of 
course a function).

1. Is this a documentation bug?
2. Is the quoting of `lambda' necessary?


Thanks,
Deniz Dogan