Fix ArcanistClosureLinter
Summary: Fixes T9498
Test Plan: Run arc lint with errors that get caught and reported by ArcanistClosureLinter
Reviewers: joshuaspence, epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T9498
Differential Revision: https://secure.phabricator.com/D14220