[libadwaita] swipeable: Add a missing period in the doc

[Alexander Mikhaylenko <alexm src gnome org>]

commit 33d4715c4c6da9acd72238202d6a9851b7353e20
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Wed May 19 08:19:29 2021 +0200

    swipeable: Add a missing period in the doc

 src/adw-swipeable.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/adw-swipeable.h b/src/adw-swipeable.h
index a263d737..d42bda7d 100644
--- a/src/adw-swipeable.h
+++ b/src/adw-swipeable.h
@@ -26,7 +26,7 @@ G_DECLARE_INTERFACE (AdwSwipeable, adw_swipeable, ADW, SWIPEABLE, GtkWidget)
  * AdwSwipeableInterface:
  * @parent: The parent interface.
  * @get_distance: Gets the swipe distance.
- * @get_snap_points: Gets the snap points
+ * @get_snap_points: Gets the snap points.
  * @get_progress: Gets the current progress.
  * @get_cancel_progress: Gets the cancel progress.
  * @get_swipe_area: Gets the swipeable rectangle.