bug#41506: 28.0.50; RTL problem

[Eli Zaretskii]

> From: Pip Cet <pipcet@gmail.com>
> Cc: 41506@debbugs.gnu.org
> Date: Sat, 06 Jun 2020 07:58:24 +0000
> 
> when we're called with bidi_it->first_elt = true, it's possible we
> shouldn't touch bidi_it->new_paragraph at all...

Can you elaborate on why you think that?

first_elt can be set when we are at the beginning of a paragraph or
when we are in the middle of it, so its meaning is different from that
of new_paragraph.

> +      paragraph might start.  But don't do that for the first
> +      element since this function will be called twice in that
> +      case.  */

Which code causes the two calls, and why is that significant in this
case?