Bug #1565919: document set types in the Language Reference.
 (backport from rev. 52297)
diff --git a/Misc/NEWS b/Misc/NEWS
index e8be7fa..443bddd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -191,6 +191,8 @@
 Documentation
 -------------
 
+- Bug #1565919: document set types in the Language Reference.
+
 - Bug #1546052: clarify that PyString_FromString(AndSize) copies the
   string pointed to by its parameter.