bug#71935: split-string-and-unquote mishandles dired-listing-switches with '

[Eli Zaretskii <eliz@gnu.org>]

> From: Juri Linkov <juri@linkov.net>
> Cc: 71935@debbugs.gnu.org
> Date: Thu, 04 Jul 2024 21:54:02 +0300
> 
> >>> 1. (setopt dired-listing-switches "-al --block-size='1")
> >>> 2. C-x d /tmp/*
> >
> > If they are a single string, split it with split-string-and-unquote,
> > then concatenate after running each one through shell-quote-argument.
> > If they are a list of strings, quote each one before concatenating
> > with mapconcat.
> 
> Ok, this seems to work:
> 
> diff --git a/lisp/files.el b/lisp/files.el
> index 042b8e2d515..6ed07f02890 100644
> --- a/lisp/files.el
> +++ b/lisp/files.el
> @@ -8195,9 +8193,11 @@ insert-directory
>  				 "\\") ; Disregard Unix shell aliases!
>  			       insert-directory-program
>  			       " -d "
> -			       (if (stringp switches)
> -				   switches
> -				 (mapconcat #'identity switches " "))
> +			       (mapconcat #'shell-quote-argument
> +                                          (if (stringp switches)
> +				              (split-string-and-unquote switches)
> +                                            switches)
> +                                          " ")
>  			       " -- "
>  			       ;; Quote some characters that have
>  			       ;; special meanings in shells; but
> 

Thanks, that's what I had in mind.  Please install on the emacs-30
branch.