Re: master ad442b8: Make all vc-*-responsible-p functions return a string

[Dmitry Gutov]

On 14.11.2021 11:41, Lars Ingebrigtsen wrote:
> Stefan Kangas<stefan@marxist.se>  writes:
>
> > I believe this broke a test:
> >
> > 1 unexpected results:
> >     FAILED  vc-test-cvs01-register
> Yup.  Should be fixed now.

FWIW, -responsible-p is documented to return non-nil rather than a 
particular string, at the top of vc.el.

So it was the previous change that was (osensibly) broken, since we'd 
generally use vc-root-dir to fetch said strings.

But I suppose this is a good change if it removes the need to hit the 
disk twice. The description of 'responsible-p' needs to be updated, 
though. Perhaps also describe what values can be returned by backends 
which do not support 'root'.