Document the .circular style class

diff --git a/gtk/gtkbutton.c b/gtk/gtkbutton.c
index 56452bb8437beb8600a30fe05c72f787d7bc510a..f552e7b10a8bfac758efa46a305e555194c71357 100644 (file)
--- a/gtk/gtkbutton.c
+++ b/gtk/gtkbutton.c
@@ -42,7 +42,8 @@
  * image or label, respectively. It may also receive the .flat style class.
  *
  * Other style classes that are commonly used with GtkButton include
- * .suggested-action and .destructive-action.
+ * .suggested-action and .destructive-action. In special cases, buttons
+ * can be made round by adding the .circular style class.
  *
  * Button-like widgets like #GtkToggleButton, #GtkMenuButton, #GtkVolumeButton,
  * #GtkLockButton, #GtkColorButton, #GtkFontButton or #GtkFileChooserButton use