Issue #2819: Add math.sum, a function that sums a sequence of floats
efficiently but with no intermediate loss of precision. Based on
Raymond Hettinger's ASPN recipe. Thanks Jean Brouwers for the patch.
diff --git a/Misc/NEWS b/Misc/NEWS
index b7b8685..9479125 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -36,6 +36,9 @@
Extension Modules
-----------------
+- Issue #2819: add full-precision summation function to math module,
+ based on Hettinger's ASPN Python Cookbook recipe.
+
- Issue #2592: delegate nb_index and the floor/truediv slots in
weakref.proxy.