Subject: bug#41531: 27.0.91; Better handle asynchronous eldoc backends

From: Stefan Monnier <[email-masked]>
Date: Mon, 25 May 2020 22:38:35 -0400

> Here's a modified approach that doesn't use a global var and should make it
> easier to transition to using futures.

I think at this stage, we should either start using futures or we should
forget about ever using them.

        Stefan