[gtk/matthiasc/for-master] Cosmetics

[Matthias Clasen <matthiasc src gnome org>]

commit 38b71ba29223adc90e0ed842ec7886e1ea707cf9
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Sep 12 11:11:28 2020 -0400

    Cosmetics
    
    Add a missing comma.

 gtk/gtkwindowhandle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkwindowhandle.c b/gtk/gtkwindowhandle.c
index 1792f5c47f..18919becac 100644
--- a/gtk/gtkwindowhandle.c
+++ b/gtk/gtkwindowhandle.c
@@ -43,7 +43,7 @@
  * @See_also: #GtkWindow, #GtkHeaderBar
  *
  * GtkWindowHandle is a titlebar area widget. When added into a window, it can
- * be dragged to move the window, and handles right click double click and
+ * be dragged to move the window, and handles right click, double click and
  * middle click as expected of a titlebar.
  *
  * # CSS nodes