Finished implementing gc.get_referrents():  dealt with error and end
cases, wrote docs, added a test.
diff --git a/Misc/NEWS b/Misc/NEWS
index 667c89e..7b8f8c0 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -49,6 +49,11 @@
 Extension modules
 -----------------
 
+- New function gc.get_referrents(obj) returns a list of objects
+  directly referenced by obj.  In effect, it exposes what the object's
+  tp_traverse slot does, and can be helpful when debugging memory
+  leaks.
+
 - The iconv module has been removed from this release.
 
 - The platform-independent routines for packing floats in IEEE formats