bug#27953: vc-region-history doesn't follow renames

[Stefan Monnier]

> Indeed, `git log -p --follow -L5,25:file.c' doesn't work.  But `git
> log -p --follow -L5,25:file.c file.c' does work (note the extra mention of
> the file name).

Hmm... what's the difference between

    git log -p -L5,25:file.c
and
    git log -p -L5,25:file.c file.c

?

Would this issue deserve a bug-report to Git?

> Any arguments against the attached patch?

I'd suggest to compute (file-relative-name file) only once, and to add
bug#27953 to the comment, but otherwise, looks good.


        Stefan