NEWS: Mark API changes since 3.2.0

NEWS

@@ -13,8 +13,8 @@
 	  (Martin Pitt) (#667954)
 	- Add test case for Gtk.ListStore custom sort (Martin Pitt) (#674475)
 	- GTK overrides: Add missing keyword arguments (Martin Pitt) (#660018)
-	- Add missing override for TreeModel.iter_previous() (Martin Pitt)
-	  (#660018)
+	- [API change] Add missing override for TreeModel.iter_previous()
+	  (Martin Pitt) (#660018)
 	- pygi-convert.py: Drop obsolete drag method conversions (Martin Pitt)
 	  (#652860)
 	- tests: Replace deprecated assertEquals() with assertEqual()
@@ -35,7 +35,7 @@
 	  (Martin Pitt) (#646667)
 	- Fix segfault when accessing __grefcount__ before creating the GObject
 	  (Steve Frécinaux) (#640434)
-	- Do not bind gobject_get_data() and gobject_set_data()
+	- [API change] Do not bind gobject_get_data() and gobject_set_data()
 	  (Steve Frécinaux) (#641944)
 	- Add test case for multiple GLib.MainLoop instances (Martin Pitt)
 	  (#663068)