Spinner: Document how to select on animated in CSS

This is not particularly obvious, so it seems worth including.

diff --git a/gtk/gtkspinner.c b/gtk/gtkspinner.c
index 0f410e01a58dcf2a530fec6bf664814d9ef96fe8..06020b3f50788e9fa3f3491db4c4549d637efa26 100644 (file)
--- a/gtk/gtkspinner.c
+++ b/gtk/gtkspinner.c
@@ -56,7 +56,8 @@
  *
  * # CSS nodes
  *
- * GtkSpinner has a single CSS node with the name spinner.
+ * GtkSpinner has a single CSS node with the name spinner. When the animation is
+ * active, the :checked pseudoclass is added to this node.
  */