More trailing whitespace removal for mixins fix

Author: thelettuce

lib/web/mage/requirejs/mixins.js

@@ -120,7 +120,7 @@ define('mixins', [
             // fix for when urlArgs is set
             if (path.indexOf('?') !== -1) {
                 path = path.substring(0, path.indexOf('?'));
-            }            
+            }
             mixins = config[path] || {};
 
             return Object.keys(mixins).filter(function (mixin) {