fix typo

labs/architecture-examples/typescript-angular/js/controllers/TodoCtrl.ts

@@ -5,7 +5,7 @@ module todos {
 
     /**
      * 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
      */
     export class TodoCtrl {
@@ -109,4 +109,4 @@ module todos {
         };
     }
 
-}
+}
\ No newline at end of file