> Isn't it so that as a general rule we don't add a vc command
> when it's not supported by more than 1 backend?
>
> It seems fine to add a git-specific 'vc-git-pull-and-push',
> but why to add 'vc-pull-and-push' supported only by git?
>
> It's more strange that the docstring of 'vc-pull-and-push' says:
>
>   "It also signals an error in a Bazaar bound branch."
>
> whereas in fact it's not implemented for Bazaar at all.

We can't release this with such uncalled api changes.
So here is the fix: