[Python-checkins] bpo-28516: document contextlib.ExitStack.__enter__ behavior (GH-31636) (GH-32145)

[JelleZijlstra]

https://github.com/python/cpython/commit/1e3132b1c3ebff8d28a6dd353bf217cb97c41e81
commit: 1e3132b1c3ebff8d28a6dd353bf217cb97c41e81
branch: 3.9
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: JelleZijlstra <jelle.zijlstra at gmail.com>
date: 2022-03-28T11:45:45-07:00
summary:

bpo-28516: document contextlib.ExitStack.__enter__ behavior (GH-31636) (GH-32145)

The enter_context is updated with following information: 'The :meth:`__enter__` method
      returns the ExitStack instance, and performs no additional operations.'

Co-authored-by: Jelle Zijlstra <jelle.zijlstra at gmail.com>
(cherry picked from commit 86384cf83f96fcaec03e2ad6516e2e24f20d3b92)

Co-authored-by: vidhya <96202776+Vidhyavinu at users.noreply.github.com>
Co-authored-by: Ned Deily <nad at python.org>

files:
M Doc/library/contextlib.rst

diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index 66a0f17a9234b..d471c8ce52796 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -368,6 +368,9 @@ Functions and classes provided:
           # the with statement, even if attempts to open files later
           # in the list raise an exception
 
+   The :meth:`__enter__` method returns the :class:`ExitStack` instance, and
+   performs no additional operations.
+
    Each instance maintains a stack of registered callbacks that are called in
    reverse order when the instance is closed (either explicitly or implicitly
    at the end of a :keyword:`with` statement). Note that callbacks are *not*