bug#56393: Actually fix the long lines display bug

[Eli Zaretskii]

> Date: Wed, 06 Jul 2022 14:27:48 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: gerd.moellmann@gmail.com, larsi@gnus.org, 56393@debbugs.gnu.org
> 
> > A 10-year old 3.4 GHz Core i7.  My Emacs is slightly slower than normal 
> > because it's a 32-bit build --with-wide-int.
> 
> This may explain that.  Because my laptop has 2.8 GHz Core i7 CPU, so it 
> should be slower.

Then maybe try to increase your keyboard auto-repeat rate?