Detect trailing spaces and tabs
Summary: Ref T12655 - this change properly detects trailing spaces or tabs (or combinations of thereof) on end of lines.
Test Plan: Use Text lint with trailing whitespace rule on files with spaces, tabs or combinations of thereof. Should properly detect and fix all those.
Reviewers: epriestley, Blessed Reviewers
Reviewed By: epriestley, Blessed Reviewers
Subscribers: Korvin, Itms
Maniphest Tasks: T12655
Differential Revision: https://secure.phabricator.com/D17814