Re: master ac6b62b: * lisp/time.el (world-clock-mode): Make non-interactive.

[Eli Zaretskii]

> From: Stefan Kangas <stefan@marxist.se>
> Date: Fri, 23 Apr 2021 09:22:29 +0000
> Cc: emacs-devel@gnu.org
> 
> >>  (define-derived-mode world-clock-mode special-mode "World clock"
> >>    "Major mode for buffer that displays times in various time zones.
> >>  See `world-clock'."
> >> +  :interactive nil
> >>    (setq-local revert-buffer-function #'world-clock-update)
> >>    (setq show-trailing-whitespace nil))
> >
> > Stefan, can you give your rationale for the change?  Why should user
> > be unable to invoke this mode interactively, when they could do so for
> > a long time?
> 
> This mode is only useful in a buffer prepared for its use by
> `world-clock'.  Running it in an arbitrary buffer will silently fail.

Is that true also for turning off the mode?