bug#62693: 28.2; VC: CVS: Fix lost file reporting and enable reverting it

[Dmitry Gutov <dmitry@gutov.dev>]

Version: 30.1

On 17/04/2023 12:24, Olivier Certner wrote:
>>> Regarding the new patch, it's great to see the list of examples, but
>>> could you instead move it to a test or several inside
>>> test/lisp/vc/vc-cvs-tests.el? This file does not exist yet, but you can
>>> use vc-git-test.el as an example, in the same directory.
>> Yes, having a test for this would be most welcome.
> The examples in the commit messages have been removed and replaced by a test
> file.
> 
> New patch attached. The only new functional change is to test for an empty
> hostname in `vc-cvs-repository-hostname', in an attempt to make it easier for
> you to see that nothing can be broken as long as `vc-cvs-parse-root' works
> correctly. Compared to the old code, the new implementation can, on an
> *invalid*  CVS/Root specifications, return an empty hostname where the older
> would return nil (assuming a correct parsing case). This has no real practical
> consequences since 'cvs' commands are anyway bound to fail at a later point in
> such a case, but may reassure you about the innocuity of this change.

Very good, I've pushed the three patches to 'master'.

Thank you for your work, and closing.