From ff8349979c2ca4e442afc583e1217519611c6c48 Mon Sep 17 00:00:00 2001
From: Barney Gale <barney.gale@gmail.com>
Date: Tue, 5 Nov 2024 18:43:43 +0000
Subject: [PATCH] GH-124985: Document that `pathlib.Path.copy()` uses
 copy-on-write. (#125861)

---
 Doc/library/pathlib.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Doc/library/pathlib.rst b/Doc/library/pathlib.rst
index b6fb36554f7..a42ac1f8bcd 100644
--- a/Doc/library/pathlib.rst
+++ b/Doc/library/pathlib.rst
@@ -1592,6 +1592,11 @@ Copying, moving and deleting
    This argument has no effect when copying files on Windows (where
    metadata is always preserved).
 
+   .. note::
+      Where supported by the operating system and file system, this method
+      performs a lightweight copy, where data blocks are only copied when
+      modified. This is known as copy-on-write.
+
    .. versionadded:: 3.14