fix typo

architecture-examples/angularjs/js/controllers/todoCtrl.js

@@ -3,7 +3,7 @@
 
 /**
  * The main controller for the app. The controller:
- * - retrieves and persist the model via the todoStorage service
+ * - retrieves and persists the model via the todoStorage service
  * - exposes the model to the template and provides event handlers
  */
 todomvc.controller('TodoCtrl', function TodoCtrl($scope, $location, todoStorage, filterFilter) {