[gtk+] actionbar: Add more docs for gtk_action_bar_get_revealed

[Matthias Clasen <matthiasc src gnome org>]

commit 841eb45b662b82ef3fd96d96298f8fa1371a60a0
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Dec 1 15:01:57 2017 -0800

    actionbar: Add more docs for gtk_action_bar_get_revealed
    
    This stops gtk-doc complaints.

 gtk/gtkactionbar.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkactionbar.c b/gtk/gtkactionbar.c
index 1413dbe..e9b4cd5 100644
--- a/gtk/gtkactionbar.c
+++ b/gtk/gtkactionbar.c
@@ -579,6 +579,8 @@ gtk_action_bar_set_revealed (GtkActionBar *action_bar,
  * gtk_action_bar_get_revealed:
  * @action_bar: a #GtkActionBar
  *
+ * Gets the value of the #GtkActionBar:revealed property.
+ *
  * Returns: the current value of the #GtkActionBar:revealed property.
  *
  * Since: 3.90