bug#32337: 26.1; display-line-numbers-mode makes cursor ill-aligned when number face is changed

[Eli Zaretskii]

> From: Carlos Pita <carlosjosepita@gmail.com>
> Date: Fri, 3 Aug 2018 20:14:29 -0300
> Cc: rms@gnu.org, 32337@debbugs.gnu.org
> 
> Eli, it ocurred to me that the line-number indicator could be extended all 
> the way down to the bottom of the
> window so it doesn't look weird when empty, since one of your objections was 
> about having that hanging
> empty last line indicator. What do you think about that option?

That looked weird (a.k.a. "bug-like") in my experiments, when the face
defines colors.  Moreover, currently we draw nothing at all beyond
EOB, we just clear the rest of the window.  So this would need special
tricky code that will complicate the display engine, something I'd
like to avoid.

> Btw, people in reddit seems to mostly prefer ~ as the ASCII char since it's 
> the vim empty line indicator.

Fine with me ('$' might be confusing anyway, because it's the default
for the left truncation glyph on TTY frames).