From 3e648f8371e342ccfa663ad77e82a538fcc8c9fb Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 11 Sep 2018 11:13:33 -0700
Subject: [PATCH] bpo-28617 Fixed docs inaccuracies about the types that
 support membership tests (GH-9086)

<!-- issue-number: [bpo-28617](https://www.bugs.python.org/issue28617) -->
https://bugs.python.org/issue28617
<!-- /issue-number -->
(cherry picked from commit 08bcf647d8a92e4bd47531588b284c6820b7a7ef)

Co-authored-by: wim glenn <wim.glenn@gmail.com>
---
 Doc/library/stdtypes.rst                                      | 4 ++--
 .../Documentation/2018-09-06-22-39-47.bpo-28617.MjnJLz.rst    | 2 ++
 2 files changed, 4 insertions(+), 2 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Documentation/2018-09-06-22-39-47.bpo-28617.MjnJLz.rst

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index e71ce75b832..efa0a89490e 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -197,8 +197,8 @@ exception.
    operator: not in
 
 Two more operations with the same syntactic priority, :keyword:`in` and
-:keyword:`not in`, are supported only by sequence types (below).
-
+:keyword:`not in`, are supported by types that are :term:`iterable` or
+implement the :meth:`__contains__` method.
 
 .. _typesnumeric:
 
diff --git a/Misc/NEWS.d/next/Documentation/2018-09-06-22-39-47.bpo-28617.MjnJLz.rst b/Misc/NEWS.d/next/Documentation/2018-09-06-22-39-47.bpo-28617.MjnJLz.rst
new file mode 100644
index 00000000000..281afad71d2
--- /dev/null
+++ b/Misc/NEWS.d/next/Documentation/2018-09-06-22-39-47.bpo-28617.MjnJLz.rst
@@ -0,0 +1,2 @@
+Fixed info in the stdtypes docs concerning the types that support membership
+tests.