phabupdate: allow revisions to be marked "closed"
(Yes, the transaction name and final state in the comment here do differ.)
Differential Revision: https://phab.mercurial-scm.org/D8753
To run the tests, do:
cd tests/
python run-tests.py
See https://mercurial-scm.org/wiki/WritingTests for
more information on writing tests.