bug#51821: 29.0.50; Suggest add variable or frame parameter: line-height

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: tumashu@163.com,  51821@debbugs.gnu.org
> Date: Tue, 16 Nov 2021 16:20:52 +0100
> 
> > That shouldn't happen, normally.  Emacs selects fonts of the same size
> > for a face.
> 
> No, not really.  Here's a trivial example:
> 
> 
> Note how the lines with jidanni are taller than the rest.

OK, let me see what can be done about that.