[libhandy] leaflet: Document swiping between children

[Alexander Mikhaylenko <alexm src gnome org>]

commit c161262b4b147d8a27196af2ee5094a5b38dc32b
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Tue Jul 21 15:18:51 2020 +0200

    leaflet: Document swiping between children

 src/hdy-leaflet.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/hdy-leaflet.c b/src/hdy-leaflet.c
index 3c2ccfc5..714a9b8d 100644
--- a/src/hdy-leaflet.c
+++ b/src/hdy-leaflet.c
@@ -24,6 +24,7 @@
  * When there is enough space the children are displayed side by side, otherwise
  * only one is displayed and the leaflet is said to be “folded”.
  * The threshold is dictated by the preferred minimum sizes of the children.
+ * When a leaflet is folded, the children can be navigated using swipe gestures.
  *
  * The “over” and “under” transitions can draw their shadow on top of the
  * window's transparent areas, like the rounded corners. This is a side-effect