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

[Gregory Heytings]

> Unless I'm fundamentally missing something, the new command 
> font-lock-update only duplicates the functionality of existing command 
> font-lock-fontify-buffer, and adds some confusion...

It does not duplicate the fonctionality, font-lock-fontify-buffer is 
bugged, font-lock-update isn't (hopefully).  To see one of its bugs, open 
your .emacs file, M-x font-lock-mode (which turns font-lock-mode off), M-x 
font-lock-fontify-buffer.  Now change some characters: the fontification 
remains.

> When font-lock-mode is active and font-lock-update is called with ARG, 
> the command unfontifies the buffer and deactivates font-lock-mode. Wut? 
> Makes no sense for a command called font-lock-update...

It allows you to toggle font-lock-mode correctly, which M-x font-lock-mode 
can't do.  Try the following: emacs -Q, unless, M-., M-h, M-w, C-x b RET, 
M-x text-mode, C-y, M-x font-lock-mode.