bug#33871: 27.0.50; Revert Dired window saved in window configuration

[martin rudalics]

> In case of a window parameter wouldn't the situation be inverted,
> so it will use an alist too, but where keys are all dired buffers
> displayed in that window from the prev-buffers list:
>
>    (set-window-parameter window 'dired-positions
>      '((#<buffer *dired-1*> dired-file-1 window-point-1)
>        (#<buffer *dired-2*> dired-file-2 window-point-2)
>        ...))

Something like that.  But I still fail to see what these lines are
supposed to accomplish in your scenario:

         (set-window-configuration w-c)
         (goto-char p-m)))

What is it 'dired-restore-positions' does not handle here?  IIUC your
lines mangle everything it has done.

martin