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

[Gregory Heytings <gregory@heytings.org>]

>> By the way, what actual problems do you see in font-lock-update?  Do 
>> you see cases where it produces unexpected results?
>
> Just the toggling part. The command is called `font-lock-update' but 
> when font-lock-mode is active and the command is called with ARG, it 
> turns font-lock-mode off. From the docstring I'm not sure if that was 
> your intention?
>

Of course it was my intention, the docstring says "With prefix ARG, toggle 
Font Lock mode."  Isn't that clear enough?

>
> Given this is a default key binding on the Holy ctl-x-map (technically 
> the ctl-x-x-map), it should probably do what it says on the tin.
>

You mean, it's the word "update" in the name of the command you don't 
like?  It's supposed to be a "dwim"-like command:

- when font-lock-mode is disabled, enable it and fontify buffer
- when font-lock-mode is enabled, refontify buffer
- with a prefix argument, toggle font-lock-mode "correctly" (i.e. making sure that the buffer is unfontified when disabling)

Whe font-lock-mode is enabled, you can turn it off with C-u C-x x f. 
When it is disabled, you can turn it on with C-u C-x x f, or simply C-x x 
f.