OverStrike control character

[Richard Wordingham]

On Sun, 21 Jun 2020 19:47:34 -0400
"Mark E. Shoulson via Unicode" <unicode at unicode.org> wrote:

> It's not about what happens if you put a strong LTR or RTL character 
> afterwards.  Those always carry their own directionality!  Read up on 
> the Unicode Bidi algorithm.  The direction of a stream of text is 
> stateful, and some characters adapt themselves to what the current 
> directionality is.  If I have A←א, what state does that leave things 
> in?  Is it the same or different from א←A?

OTL can't handled mixed script text.  Interracting characters have to
wind up in the same script run.

Richard.