Force the use of single quotes

src/components/loading/loading.js

@@ -19,7 +19,7 @@ define(['components/loading/loadingLegacy', 'browser', 'css!./loading'], functio
 
             if (!elem) {
 
-                elem = document.createElement("div");
+                elem = document.createElement('div');
                 loadingElem = elem;
 
                 elem.classList.add('docspinner');

src/components/loading/loadingLegacy.js

@@ -7,7 +7,7 @@ define(['require', 'css!./loadingLegacy'], function (require) {
         show: function () {
             var elem = loadingElem;
             if (!elem) {
-                elem = document.createElement("img");
+                elem = document.createElement('img');
                 elem.src = require.toUrl('.').split('?')[0] + '/loader.gif';
 
                 loadingElem = elem;