bug#50660: 28.0.50; Text artifacting when the cursor moves over text under mouse face that originally displayed a box

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> Feel free to dig in the display code involved in this, I don't intend
> doing that any time soon.

Ok, I spent some time doing that.  I have attached a patch which
resolves this problem on my side, but could you please look at it and
see if I'm doing anything wrong?  Thanks.

I have tried to provide a detailed explanation of the changes in the
patch message and the code itself.

fix-cursor-position.patch
Description: Fix