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

[Juri Linkov]

>> > To avoid other possible future problems, please consider
>> > putting all such vc-dired commands on a VC-marking prefix
>> > key, such as `* v'.
>>
>> `* v' is not mnemonic for marking.  The character `*'
>> has such mnemonic because `*' *is* a marking char.
>
> Yes, `*' has that meaning.  So `* v' can have the meaning
> of marking VC stuff.

The whole keymap of VC-dired has the meaning of VC stuff.

> See "all", above.  `* v' as a _prefix_ key, for marking
> stuff in VC-dired.  And this is an example - marking
> unregistered stuff (presumably).

The prefix `v' is redundant in VC-dired.

>> > 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.

In Dired `dired-unmark' is bound to `u'.  Why Dired needs another
key sequence `* u' that is longer to type.  Since it makes no sense
to use `* u' in Dired, this key can be used in VC-dired for other purposes.