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

[Juri Linkov]

>> Let's please make it another backend command instead of piggy-backing on
>> 'log-search'.
>
> I agree.
>
> Stepping a notch back, wasn't the original request to have a command
> that would display a specific commit?  If so, that's not a "log"
> command, that's closer to a "diff" command.  And don't we already have
> a "diff" command which shows diffs for a specific revision?

Then we could use something like the existing backend 'region-history'
that for vc-git uses 'git log', but displays both the log and diff
in one output buffer.