[3.6] bpo-33828: Add missing versionchanged note for string.Formatter. (GH-7668) by miss-islington · Pull Request #7675 · python/cpython

@zhangyangyu @miss-islington

…honGH-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 b9d8ad5)

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

zhangyangyu