Re: emacs-27 30a7ee5: Fix Arabic shaping when eww/shr fill the text to be rendered

[Stefan Monnier]

>     Fix Arabic shaping when eww/shr fill the text to be rendered
>     * src/hbfont.c (hbfont_shape): Don't use DIRECTION if the current
>     buffer has bidi reordering disabled.  (Bug#41005)
[...]
> -  if (!NILP (direction))
> +  if (!NILP (direction)
> +      /* If they bind bidi-display-reordering to nil, the DIRECTION
> +      they provide is meaningless, and we should let HarfBuzz guess
> +      the real direction.  */
> +      && !NILP (BVAR (current_buffer, bidi_display_reordering)))

Hmm... so indeed I see that SHR binds `bidi-display-reordering`.
Isn't that a problem, since its docstring says:

    [...]
    Setting this to nil is intended for use in debugging the display code.
    [...]

Can we change SHR so it doesn't bind this var?


        Stefan