Remove trailing command and space from dom/Control.js

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
API comment cleanup. Enyo-DCO-1.1-Signed-Off-By: Jim Tang (jim.tang@lge.com)
API comment cleanup. Enyo-DCO-1.1-Signed-Off-By: Jim Tang (jim.tang@lge.com)