bug#41531: 27.0.91; Better handle asynchronous eldoc backends

[Dmitry Gutov]

On 08.07.2020 06:58, Stefan Monnier wrote:
> I don't have the time or energy to work on eldoc myself, and apparently
> neither do you, so the one who writes the code gets to take most of
> the decisions.

I have offered to do a rewrite multiple times now.

The only encouragement in that direction I have received was "can't stop 
you".

>  From what I remember the last time I looked at the branch, there were
> things I didn't much like, but not more so than in the rest of Emacs;-)

I thought we were more into detailed reviews and good code.