Re: 'M-o' ('facemap-keymap') has now been removed until March 10th 2021

["Paul W. Rankin" via "Emacs development discussions." <emacs-devel@gnu.org>]

> On 25 Mar 2021, at 1:40 am, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
> 
>> I'm responding to a very narrow issue Gregory raised, which was that yanking
>> a defun from an emacs-lisp-mode into a text-mode-buffer, then deactivating
>> font-lock-mode did not remove what he considers to be fontification. To me,
>> this makes sense because text-mode does not fontify most text, thus any text
> 
> Yes, but the question is not whether it makes sense but whether it's desirable.
> If it's not desirable than it doesn't matter whether we provide/preserve
> this behavior.

I see. Yes I think it's desirable. For me the desirable aspect is the distinction between text props and font-lock. Moreover I think the degree to which a thing makes sense also contributes to its desirability (if that makes sense).

And the undesirable aspects of the font-lock-update command the misleading side-effects: that it removed things and/or deactivated a minor mode. Put these things in other commands if they're going on C-x.