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

[Dmitry Gutov]

On 21.02.2020 1:14, Juri Linkov wrote:
> Also some parts of the previous patch should be reverted
> because I discovered that state changing VC operations in Dired
> even on marked files (as opposed to directories) is unreliable:
> when a file is modified, using vc-state doesn't return its real state
> when updated outside of Emacs.

Right. More so than in VC-Dir buffers, which use dir-status-files already.

> +(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.

> +(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?