accel label: Add diagrams to CSS documentation

diff --git a/gtk/gtkaccellabel.c b/gtk/gtkaccellabel.c
index d94b7a48be637986ff68189edfd768988b35cdeb..5b03a6819c3cfd722f4197cc0cb59141f6d9fb2a 100644 (file)
--- a/gtk/gtkaccellabel.c
+++ b/gtk/gtkaccellabel.c
@@ -97,6 +97,11 @@
  *
  * # CSS nodes
  *
+ * |[<!-- language="plain" -->
+ * label
+ * ╰── accelerator
+ * ]|
+ *
  * Like #GtkLabel, GtkAccelLabel has a main CSS node with the name label.
  * It adds a subnode with name accelerator.
  */