RFR: CODETOOLS-7901466: Mercurial 3.4 breaks behavior of webrev -r

[David DeHaven]

I’ve been using this patch since December and it seems to be working well with both Mercurial 2.8 and 3.6.2. I don’t think I can push to code-tools so will need a Committer to push for me.

webrev (and example):
http://cr.openjdk.java.net/~ddehaven/CODETOOLS-7901466/patched/

Also updated copyright year and version number.

-DrD-