document the performance fix to builtin_sum().
diff --git a/Misc/NEWS b/Misc/NEWS
index 08568dd..f47113c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -23,6 +23,9 @@
starting with Py2.3 are guaranteed to be stable (the relative order of
records with equal keys is unchanged).
+- Added a list.copysort() method that returns a copy of the sorted list
+ while leaving the original intact.
+
- Added test whether wchar_t is signed or not. A signed wchar_t is not
usable as internal unicode type base for Py_UNICODE since the
unicode implementation assumes an unsigned type.
@@ -44,6 +47,9 @@
- obj.__contains__() now returns True/False instead of 1/0. SF patch
820195.
+- builtin_sum() now uses PyNumber_InPlaceAdd, fixing a previous
+ performance bug for sum(list_of_lists) and similar cases.
+
Extension modules
-----------------