bug#54177: 28.0.91; project-find-regexp misbehaves with ripgrep over tramp/sudo

[Eli Zaretskii]

> Date: Sun, 27 Feb 2022 04:45:14 +0200
> From: Dmitry Gutov <dgutov@yandex.ru>
> 
> --- a/lisp/progmodes/xref.el
> +++ b/lisp/progmodes/xref.el
> @@ -1626,7 +1626,7 @@ xref-search-program-alist
>       (ripgrep
>        .
>        ;; '!*/' is there to filter out dirs (e.g. submodules).
> -     "xargs -0 rg <C> --null -nH --no-messages -g '!*/' -e <R>"
> +     "xargs -0 rg <C> --null -nH --no-heading --no-messages -g '!*/' -e 
> <R>"
>        ))
>     "Associative list mapping program identifiers to command templates.
> 
> Is this okay for Emacs 28?

Is this additional switch supported by all versions of 'rg'?