R1:0de66e9c75ba

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Summary:
We prefer parsing freetext fields.
We should probably wait for {T2743}.

Test Plan:
$ arc --conduit-uri=http://phabricator.local/ diff

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5349