Re: Merge-base alias for git vc-diff

[Juri Linkov]

>> The only problem is that then we have to use different amount of dots
>> for vc-root-diff and vc-print-root-log because in git: ‘git diff
>> A...B’ corresponds to ‘git log A..B’ whereas ‘git diff A..B’
>> corresponds to ‘git log A...B’
>
> Really? Ugh, that unfortunate.  Well we could just live with it or use
> different symbols to abstract it away.

I still have no idea how to read a start/end revision in
‘C-u C-x v L’.  Currently it accepts a limit as a number.
I wonder is it possible to parse its minibuffer's input
and to distinguish such number from the revision?
Maybe using a regexp?