Fix rubocop lint tests

Summary: Fix tests to work with rubocop 0.92.0 released on September 25, 2020

Test Plan: Unit tests pass

Reviewers: Blessed Reviewers, epriestley

Reviewed By: Blessed Reviewers, epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D21474