bug#38563: 27.0.50; Company popup renders with newlines (?) inheriting the bg properties of the character at next line's bol

[Eli Zaretskii]

> Date: Fri, 13 Dec 2019 11:30:50 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 38563@debbugs.gnu.org
> 
> > That's not a bug: the face on that thin line on whose first character
> > you put the tooltip overlay has a non-nil :extend attribute, so
> > Company will have to explicitly say ':extend nil' in its face(s) to
> > countermand that.
> 
> Actually, this won't work.  Let me think some more about this
> situation.

I think I found a better solution, which should "just work" for you.
Please try the latest master.