[Python-checkins] bpo-33828: Add missing versionchanged note for string.Formatter. (GH-7668)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/29fdea5ec2054f18e68733ec83edbd0b855fd8bb
commit: 29fdea5ec2054f18e68733ec83edbd0b855fd8bb
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2018-06-12T19:10:51-07:00
summary:

bpo-33828: Add missing versionchanged note for string.Formatter. (GH-7668)


string.Formatter auto-numbering feature was added in 3.4 and there
is no versionchanged note in its documentation, making the documentation
ambiguous about which version the feature is available.
(cherry picked from commit b9d8ad5130e0f77be28a3dec6d468e6470835573)

Co-authored-by: Xiang Zhang <angwerzx at 126.com>

files:
M Doc/library/string.rst

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index ee8ea857da4b..89955cfddb38 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -231,8 +231,11 @@ attribute using :func:`getattr`, while an expression of the form ``'[index]'``
 does an index lookup using :func:`__getitem__`.
 
 .. versionchanged:: 3.1
-   The positional argument specifiers can be omitted, so ``'{} {}'`` is
-   equivalent to ``'{0} {1}'``.
+   The positional argument specifiers can be omitted for :meth:`str.format`,
+   so ``'{} {}'.format(a, b)`` is equivalent to ``'{0} {1}'.format(a, b)``.
+
+.. versionchanged:: 3.4
+   The positional argument specifiers can be omitted for :class:`Formatter`.
 
 Some simple format string examples::