> Note that the last line of this buffer:
> 
>    !   to try it, and enable all disabled commands for this session only.
> 
> is not visible.  And since, after displaying this message,
> disabled-command-function awaits user input, there is no way within
> Emacs to see that last line before responding.  (It is, however,
> possible to see it by using the window manager to increase the height
> of the Emacs frame, if the monitor allows it.  But this wouldn't help
> if you're running Emacs in a tty with sufficiently few screen lines.)

Could you please try the attached patch?