bug#17905: 24.3.50; writing with a giant font triggers RTL text entry

[Eli Zaretskii]

> Date: Thu, 03 Jul 2014 19:57:30 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: holtzermann17@gmail.com, 17905@debbugs.gnu.org
> 
> If it only shows up when point is in a partially visible line, then
> the bug is that Emacs lets point be displayed in such a line.  It is
> supposed to scroll the display to have the line with point be fully
> visible.
> 
> And indeed, I have a very hard time forcing Emacs to let me have point
> in a partially visible line.

If I'm right in what I think is the root cause for this, it goes back
at least to Emacs 22.