On February 4, 2019 11:54:03 AM EST, Eli Zaretskii <eliz@gnu.org> wrote:

From: Ian Dunn <dunni@gnu.org>
Date: Sun, 03 Feb 2019 21:55:50 -0500

* vc/vc-hg.el (vc-hg-revert-switches): New user variable.
  (vc-hg-revert): Use switches for revert.

Thanks.  Please also include an announcement of this in NEWS.