Fix all Python Cookbook links (#22205)
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py
index 4d62eb1..f5283c5 100644
--- a/Lib/test/test_math.py
+++ b/Lib/test/test_math.py
@@ -611,7 +611,7 @@
def msum(iterable):
"""Full precision summation. Compute sum(iterable) without any
intermediate accumulation of error. Based on the 'lsum' function
- at http://code.activestate.com/recipes/393090/
+ at https://github.com/ActiveState/code/tree/master/recipes/Python/393090_Binary_floating_point_summatiaccurate_full/recipe-393090.py
"""
tmant, texp = 0, 0