Re: tutorial: "Control-X-prefix is now on M-x Control-X-prefix"

[Lennart Borgman (gmail)]

Chris Moore wrote:
> Run
>
>   $ emacs -Q
>
> and type:
>
>   <escape> x iswitchb-mode <return> C-h t C-s more C-b <return>
>
> to see:
>
>   The following key bindings used in the tutorial had been changed
>   from the Emacs default in the TUTORIAL (English) buffer:
>
>      Key       Standard Binding            Is Now On   Remark
>      C-x       Control-X-prefix            M-x Control-X-prefix more info
>
> there is no M-x Control-X-prefix command, and I've not rebound C-x to anything.
>   
iswitchb-mode binds C-x by setting

   (define-key map "\C-x\C-f" 'iswitchb-find-file)

in the minor mode map. (It sets some other C-x keys in the global map. 
Seems a bit weird but I did not check further.)
I guess this does not interfere with the normal C-x handling (from a 
users point of view)? Cua mode does something similar. (Are there any 
collisions?)
Should this be treated like the corresponding Cua mode case in the tutorial=