From 756eb849d7d968f0a0924fa33b68c62831e8884e Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 10 Sep 2019 07:57:16 -0700
Subject: [PATCH] bpo-37913: document that __length_hint__ can return
 NotImplemented (GH-15383)

(cherry picked from commit ed99bb9ca68b37cfaec3629afa67d70289f3ffc7)

Co-authored-by: Steve Dower <steve.dower@python.org>
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2.47.3