bug#27427: 26.0.50; Native line numbers lead to display error in company-mode popup

[Eli Zaretskii]

> Date: Sat, 01 Jul 2017 17:20:34 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: dgutov@yandex.ru, alexanderm@web.de, 27427@debbugs.gnu.org
> 
>  > Why not the other way around: let the application specify the text and
>  > the position of the popup in dedicated variables, and then redisplay
>  > could just access those as part of its job?
> 
> The application has to react when a given buffer position changes its
> position on screen.

Yes, but I presumed it will do it the same way company-mode reacts to
such changes today.  Currently. company-mode recomputes and moves its
overlay; it will instead recompute the text and its position.