Summary: Ref T603. Clean these up and move them to a single place.
Test Plan:
- Downloaded a raw diff.
- Enabled "attach diffs", created a revision, got an email with a diff.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T603
Differential Revision: https://secure.phabricator.com/D7179
