bug#34949: 27.0.50; Docstring of `vc-deduce-fileset' incomplete

[Juri Linkov]

>> +(defun vc-directory-deduce-fileset (dir callback)
>> +  ;; TODO: use vc-dir-status-files
>> +  )
>
> I should note that if could be, by any chance, satisfied with only using
> vc-next-action-on-root in VC-Dir buffers, there would be no need to call 
> dir-status-files here.

Do you propose 'C-x v v' when typed in Dired to open VC-Dir and mark
files marked in Dired, i.e. to sync marks between Dired and VC-Dir?

And a new keybinding 'C-x v V' (vc-next-action-on-root) typed
in any file/dired should open VC-Dir and mark all edited files?

>> +(defun vc-dir-status-files (backend dir files update-function)
>> +  (funcall update-function
>> +           (mapcar (lambda (file) (list file 'up-to-date)) files)))
>
> This is a... test function?

Unfinished implementation...