[gtk+] Small documentation additions

[Matthias Clasen <matthiasc src gnome org>]

commit 1bffefce7d9cd24bb4447325bbfde2fc8171ad67
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Nov 19 13:45:58 2016 -0500

    Small documentation additions

 gtk/gtkwidget.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index a01a344..5ebb019 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -3087,6 +3087,9 @@ gtk_widget_class_init (GtkWidgetClass *klass)
   /**
    * GtkWidget::accel-closures-changed:
    * @widget: the object which received the signal.
+   *
+   * The ::accel-closures-changed signal gets emitted when accelerators for this
+   * widget get added, removed or changed.
    */
   widget_signals[ACCEL_CLOSURES_CHANGED] =
     g_signal_new (I_("accel-closures-changed"),