[Integrated] RFR: Python 3 compatibility for mercurial extension

[Robin Westberg]

Changeset: 0c381067
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-04-23 04:49:37 +0000
URL:       https://git.openjdk.java.net/skara/commit/0c381067

Python 3 compatibility for mercurial extension

Reviewed-by: ehelin

! skara.py