bug#38044: 27.0.50; There should be an easier way to look at a specific vc commit

[Dmitry Gutov]

On 23.11.2019 20:50, Juri Linkov wrote:
> -                    (list start-revision)))
> +                    (if (eq limit 1)
> +                        (list "-p" start-revision)
> +                      (list start-revision))))
>
> +A special case is when the prefix argument is 1, in this case
> +it asks for the revision and shows it with its diff."

I think that's rather ugly (see my comment about having the arguments to 
be orthogonal), and it precludes the use of this backend action to print 
a more extensive commit log (with diffs, that is).

> +    (when (and (eq limit 1) revision)
> +      (vc-git-region-history-mode))))

A Git-specific function in vc.el?