RE: master adfcc17: * lisp/vc/vc-dir.el: Commands to mark un/registered files (bug#34949)

[Drew Adams]

> '* u' was not added because Drew opposed on the ground that it will
> conflict with the same keybinding in Dired where it is bound to
> 'dired-unmark'.

I gave reasons for not conflicting with Dired bindings,
if VC Dired is derived from Dired, and especially if
such bindings make sense also for VC Dired.

But there can be other, opposing reasons to repurpose
a given Dired binding, again especially if the Dired
binding is not so useful in VC Dired.

There's no hard and fast rule, IMO.  Such things are
judgment calls, after weighing pros & cons.  It's you
who should decide what to do here, for VC Dired.