bug#70593: 30.0.50; Dired: buffers of renamed dirs are broken

[Eli Zaretskii]

> Date: Fri, 26 Apr 2024 13:59:16 +0200
> From:  Michael Heerdegen via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> The problem is that we partially fail to update the affected buffers.
> 
> The code wants to do this in `dired-rename-subdir-1':
> 
>     (if (equal dir default-directory)
>       ;; if top level directory was renamed, lots of things have to be
>       ;; updated:
> 
> DIR is the old directory name.  But the `equality' test fails simply
> because default-directory is "~/test/" but DIR has the tilde expanded.

So all we need to do is call expand-file-name on both of them?  Or do
we need also to call file-truename?