From b6299e8f16c1e6ab1d3dab42f9803e00fb0bdddb Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Thu, 15 May 2025 03:32:45 +0200
Subject: [PATCH] [3.14] gh-133986: Document string split algorithm when sep is
 None and maxsplit is 0 (GH-133987) (#133993)

---------
(cherry picked from commit 3e23047363f384b7254b7af51afe4e353be94167)

Co-authored-by: Joey Smith <joeysmith@gmail.com>
Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>
Co-authored-by: Semyon Moroz <donbarbos@proton.me>
---
 Doc/library/stdtypes.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 1d9a655c766..3486a18b5cb 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -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