bug#29078: 25.2; font issue with FreeType 2.8; should not use the rounded ascender and descender

[Eli Zaretskii]

> Date: Mon, 18 Nov 2019 19:50:09 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: larsi@gnus.org, 29078@debbugs.gnu.org
> 
> My point is that this seems to have nothing to do with the FreeType
> library or its version, since I see the same on a system that uses
> neither FreeType nor this particular font.

And indeed the reason here seems to be that some of the box-drawing
characters are taken from a different font.

Could it be that the same happens on your system?  If you press and
hold the right arrow key on the first line with the boxes (the 3rd
line of the file, starting from top), do you see the block cursor
sometimes becoming slightly larger?  If so, the characters where it
becomes larger come from a different font, which is slightly taller
than the default font; delete those taller characters, and the gaps
should disappear.  They did here.