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

[Dmitry Gutov]

On 23.11.2019 15:59, Eli Zaretskii wrote:
> > Cc: larsi@gnus.org, stephen.berman@gmx.net, 38044@debbugs.gnu.org,
> >   juri@linkov.net
> > From: Dmitry Gutov <dgutov@yandex.ru>
> > Date: Fri, 22 Nov 2019 23:43:08 +0200
> >
> > For Git, we need 'git log -p -n 1', for Hg, 'hg log -p -l 1'.
>
> Btw, it looks like only Git and Src need to explicitly limit the
> output of 'log' to just a single revision, others have a way of
> specifying a single revision for 'log'.  They all use "-r REVISION"
> for that.

I don't think we are going to use this new fact because the print-log 
implementations already have a start-revision argument, and it's 
implemented in a way that shows both the given revision and the previous 
ones. And there is an argument to limit the number of shows revisions.

We'll want the new argument to be as orthogonal to the existing ones as 
possible.