Differential - label unit / lint results from the commit diff as not applicable

Summary: Fixes T5536. Some bonus pht in there.

Test Plan: made a diff hovered over the stars and saw my new text.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5536

Differential Revision: https://secure.phabricator.com/D10487