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[3.14] gh-133986: Document string split algorithm when sep is None and maxsplit is 0 (GH-133987) (#133993)

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(cherry picked from commit 3e23047363)

Co-authored-by: Joey Smith <joeysmith@gmail.com>
Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>
Co-authored-by: Semyon Moroz <donbarbos@proton.me>
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Miss Islington (bot) 2025-05-15 03:32:45 +02:00 • committed by GitHub
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Doc/library/stdtypes.rst
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@ -2269,6 +2269,18 @@ expression support in the :mod:`re` module).
>>> ' 1 2 3 '.split()
['1', '2', '3']
If *sep* is not specified or is ``None`` and *maxsplit* is ``0``, only
leading runs of consecutive whitespace are considered.
For example::
>>> "".split(None, 0)
[]
>>> " ".split(None, 0)
[]
>>> " foo ".split(maxsplit=0)
['foo ']
.. index::
single: universal newlines; str.splitlines method