label docs: Mention common style classes

Mention some of the style classes that are commonly used
with labels.

diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index e10558f715acab85006f3ec9f06a850fa2b81374..e669ed9b45d676eca90fb6acfba588dd130a916d 100644 (file)
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -73,7 +73,9 @@
  *
  * # CSS nodes
  *
- * GtkLabel has a single CSS node with the name label.
+ * GtkLabel has a single CSS node with the name label. A wide variety
+ * of style classes may be applied to labels, such as .title, .subtitle,
+ * .dim-label, etc.
  *
  * # GtkLabel as GtkBuildable
  *