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

[Drew Adams]

> > VC-Dir needs the same key prefix as is provided by Dired:
> >
> > * %             dired-mark-files-regexp
> > * *             dired-mark-executables
> > * /             dired-mark-directories
> > * ?             dired-unmark-all-files
> > * @             dired-mark-symlinks
> > * s             dired-mark-subdir-files
> >
> > Then VC-Dir could provide, for example:
> >
> > * r             vc-dir-mark-registered
> > * u             vc-dir-mark-unregistered
> > ...

Apologies for not following this thread (at all).
Just happened to notice this message.

`* u' is already bound to `dired-unmark', in Dired mode.

It would be good if you found some other key for this,
if the mode in question derives from `dired-mode'.

To avoid other possible future problems, please consider
putting all such vc-dired commands on a VC-marking prefix
key, such as `* v'.

E.g., use `* v u' for `vc-dir-mark-unregistered'.  `* v'
is currently undefined for Dired, and that way Dired
sacrifices only `* v', for possible Dired marking commands.

(But personally I think it's better to keep all VC command
bindings on a single keymap, on a single prefix key.  Most
are on prefix key `C-x v', I believe.)