RFR: Add Repository::revert

[Robin Westberg via github.com]

On Mon, 19 Aug 2019 13:33:55 GMT, Erik Duveblad via github.com <duke at openjdk.java.net> wrote:

> Hi all,
> 
> this small patch adds the `Repository::revert` method, the corresponding git and hg implementations and a small test.
> 
> ## Testing
> - [x] `sh gradlew test` passes on Linux x86_64
> 
> ----------------
> 
> Commits:
>  - 7e30d6c3:	Add Repository::revert
> 
> Pull request:
> https://git.openjdk.java.net/skara/pull/60
> 
> Webrev:
> https://webrevs.openjdk.java.net/skara/60/webrev.00
> 
> Patch:
> https://git.openjdk.java.net/skara/pull/60.diff
> 
> Fetch command:
> git fetch https://git.openjdk.java.net/skara pull/60/head:pull/60

This PR has been reviewed by Robin Westberg via github.com - changes are approved. Review comment:

Looks good to me.

PR: https://git.openjdk.java.net/skara/pull/60