bug#72426: 29.2.50; comint-pager doesn't affect async-shell-command

[Eli Zaretskii <eliz@gnu.org>]

> From: Spencer Baugh <sbaugh@janestreet.com>
> Cc: jporterbugs@gmail.com,  72426@debbugs.gnu.org
> Date: Tue, 06 Aug 2024 12:42:09 -0400
> 
> --- a/lisp/startup.el
> +++ b/lisp/startup.el
> @@ -854,6 +854,10 @@ normal-top-level
>      ;; We are careful to do it late (after term-setup-hook), although the
>      ;; new multi-tty code does not use $TERM any more there anyway.
>      (setenv "TERM" "dumb")
> +    ;; Likewise, subprocesses should not use a pager unless told
> +    ;; otherwise, since it generally won't work.
> +    (when (executable-find "cat")
> +      (setenv "PAGER" "cat"))

We need to work on the comment, because it doesn't explain any of what
it needs to.  Worse, it says something very confusing and at least
inaccurate.