path: root/Misc/NEWS.d/next/Library/2020-03-03-16-21-41.bpo-39674.HJVkD5.rst

Revert "bpo-37330: open() no longer accept 'U' in file mode". The "U" mode of
open() is kept in Python 3.9 to ease transition from Python 2.7, but will be
removed in Python 3.10.