remove trailing whitespace
remove trailing whitespace

kevmoo/firebase-dart,ronlobo/firebase-dart,collinjackson/firebase2-dart,sirctseb/firebase-dart,collinjackson/firebase2-dart,ronlobo/firebase-dart,collinjackson/firebase2-dart,kasperpeulen/firebase-dart,ronlobo/firebase-dart,collinjackson/firebase2-dart,kevmoo/firebase-dart,kevmoo/firebase-dart,kasperpeulen/firebase-dart,sirctseb/firebase-dart,sirctseb/firebase-dart,kasperpeulen/firebase-dart