Correct a bunch of mercurial revset construction
Correct a bunch of mercurial revset construction

Summary: Possibly improves T2387 state of the world?

Test Plan: not yet

Reviewers: bos, DurhamGoode

Reviewed By: DurhamGoode

CC: aran

Maniphest Tasks: T2387

Differential Revision: https://secure.phabricator.com/D4712

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