bug#13043: Invoking disabled commands interferes with the help system

[Chong Yidong]

Kelly Dean <kellydeanch@yahoo.com> writes:

> C-h f emacs-version RET
> C-next
> Answer "no" regarding executing the disabled command.
> C-h f emacs-uptime RET
> Click BACK in the help buffer.
> Emacs again asks whether to execute the disabled command. It shouldn't
> ask the second time.
>
> novice.el has the function disabled-command-function with the line:
>       (help-setup-xref (list 'disabled-command-function cmd keys) nil)
> The bug is fixed by deleting that line.

Thanks, fixed in trunk.