bug#12443: 24.2.50; Default values in the minibuffer prompt (fix inconsisntecy)

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Sun, 13 Sep 2020 11:53:10 +0300
> Cc: 12443@debbugs.gnu.org
> 
> Another case is just ‘C-x d’ (dired) - it displays the duplicate
> directory name too: in the default value and the same in the initial input:
> 
>   Dired (directory) (default /tmp/foo/bar/): /tmp/foo/bar/

Yes, I've noticed this as well.  We need to fix this.