Don't link objects after a hyphen
Summary: Fixes T5714. Don't link objects when their names appear after a hyphen.
Test Plan: Tested F123 (link), (F123) (link), G12-F123 (no link).
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T5714
Differential Revision: https://secure.phabricator.com/D10456