Using IPython.utils.keycodes in the nb rename dialog.

IPython/frontend/html/notebook/static/js/savewidget.js

@@ -99,7 +99,7 var IPython = (function (IPython) {
                 var that = $(this);
                 // Upon ENTER, click the OK button.
                 that.find('input[type="text"]').keydown(function (event, ui) {
-                    if (event.which === 13) {
+                    if (event.which === utils.keycodes.ENTER) {
                         that.parent().find('button').first().click();
                     }
                 });