gtk_builder_add_from_string takes more than 2 parameters.
https://bugzilla.gnome.org/show_bug.cgi?id=741897
* |[<!-- language="C" -->
* app = gtk_application_new ();
*
- * builder = gtk_builder_new ();
- * gtk_builder_add_from_string (builder,
+ * builder = gtk_builder_new_from_string (
* "<interface>"
* " <menu id='menubar'>"
* " <submenu label='_Edit'>"
* " <item label='_Paste' action='win.paste'/>"
* " </submenu>"
* " </menu>"
- * "</interface>");
+ * "</interface>",
+ * -1);
*
* menubar = G_MENU_MODEL (gtk_builder_get_object (builder,
* "menubar"));