Fix wrong number of braces.

Thanks to wdscxsj@gmail.com for pointing this out.

javascriptguide.xml

@@ -994,7 +994,7 @@
 
             if (searchableCollection(allYourStuff).contains(theStuffYouWant) &&
                 !ambientNotification.isActive() && (client.isAmbientSupported() ||
-                                                    client.alwaysTryAmbientAnyways()) {
+                                                    client.alwaysTryAmbientAnyways())) {
               ambientNotification.activate();
             }
           </CODE_SNIPPET>