bug#61290: 28.2; Ligatures messing up fontify subscripts in AUCTeX

[Eli Zaretskii]

> From: Tassilo Horn <tsdh@gnu.org>
> Cc: Jeremy Van Cleve <jeremy.vancleve@gmail.com>, 61290@debbugs.gnu.org
> Date: Sun, 05 Feb 2023 10:28:42 +0100
> 
> I'm somewhat relieved to say its the very same with the stock emacs
> tex-mode.el which does pretty much the same as AUCTeX, i.e., a simple
> reproducer is to open the tex file
> 
> --8<---------------cut here---------------start------------->8---
> \documentclass{article}
> \begin{document}
> \begin{equation}
>   A_{x+b-c*d/e}
> \end{equation}
> Here is a ligature -> and another one !=.
> \end{document}
> --8<---------------cut here---------------end--------------->8---
> 
> with emacs -Q.  It looks correct but gets wonky after evaluating
> Jeremy's ligature setup.

Thanks, should be fixed now on the emacs-29 branch.