bug#58512: Patch to make cperl-perldoc call perldoc case-insensitively

[Stefan Kangas]

Reuben Thomas via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs@gnu.org> writes:

> The attached patch calls perldoc with -i, so it is case insensitive. This
> is more convenient (the user doesn't have to get the case right), and works
> like "man". I find this particularly useful for perl, as many modules and
> functions have mixed case in their names.
>
> --
> https://rrt.sc3d.org
> From b175a9fb7eea49cdf8171821498f2c5efaaecd98 Mon Sep 17 00:00:00 2001
> From: Reuben Thomas <rrt@sc3d.org>
> Date: Fri, 14 Oct 2022 13:30:43 +0200
> Subject: [PATCH] Do perl documentation lookups case-insensitively, like man
>
> * lisp/progmodes/cperl-mode.el (cperl-perldoc): add -i to the perldoc
> command.
> ---
>  lisp/progmodes/cperl-mode.el | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lisp/progmodes/cperl-mode.el b/lisp/progmodes/cperl-mode.el
> index 20a73e238e9..539b2771490 100644
> --- a/lisp/progmodes/cperl-mode.el
> +++ b/lisp/progmodes/cperl-mode.el
> @@ -8323,7 +8323,7 @@ cperl-perldoc
>                                 'cperl-short-docs
>                                 'variable-documentation))))
>        (Man-switches "")
> -      (manual-program (if is-func "perldoc -f" "perldoc")))
> +         (manual-program (concat "perldoc -i" (if is-func " -f"))))
>      (Man-getpage-in-background word)))
>
>  ;;;###autoload
> --
> 2.34.1

LGTM.