ref: 3627111c5210a5b134b0e8c43b90eed07ca2e17c
parent: bef1b2c59b443a2778a01e6c167e29ee9670603a
author: Kevin Lyles <kevinlyles@gmail.com>
date: Sat May 9 15:11:02 EDT 2015
Fix the extra arrow hanging around while moving the opposite existing arrow