Fix-up moving average example.
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 3f57348..4c64d61 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -455,10 +455,9 @@
# moving_average([40, 30, 50, 46, 39, 44]) --> 40.0 42.0 45.0 43.0
# http://en.wikipedia.org/wiki/Moving_average
it = iter(iterable)
- d = deque(itertools.islice(it, n))
+ d = deque(itertools.islice(it, n-1))
+ d.appendleft(0)
s = sum(d)
- if len(d) == n:
- yield s / n
for elem in it:
s += elem - d.popleft()
d.append(elem)