Doc and NEWS changes due to Jeremy adding traceback objects to gc.
diff --git a/Misc/NEWS b/Misc/NEWS
index 13f3fb5..4fc5c1d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -16,6 +16,10 @@
 
 Library
 
+- Traceback objects are now scanned by cyclic garbage collection, so
+  cycles created by casual use of sys.exc_info() no longer cause
+  permanent memory leaks (provided garbage collection is enabled).
+
 Tools/Demos
 
 Build