menubutton: Correct the css docs

We are using menubutton instead of button.popup now.

diff --git a/gtk/gtkmenubutton.c b/gtk/gtkmenubutton.c
index d37ee47fc1c389e36f13163f7d07a8e6633c2034..29a320aff3ca48428f30844a9874046651e5aac3 100644 (file)
--- a/gtk/gtkmenubutton.c
+++ b/gtk/gtkmenubutton.c
@@ -104,8 +104,14 @@
  *
  * # CSS nodes
  *
- * GtkMenuButton has a single CSS node with name button. To differentiate
- * it from a plain #GtkButton, it gets the .popup style class.
+ * |[<!-- language="plain" -->
+ * menubutton
+ * ╰── button.toggle
+ *     ╰── [content]
+ *]|
+ *
+ * GtkMenuButton has a single CSS node with name menubutton
+ * which contains a toggle button node.
  *
  * # Accessibility
  *