bpo-26468: Doc: improve the documentation of shutil.copy2 when it can fail. (GH-13765)
diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst
index 88c5f62..174b7e8 100644
--- a/Doc/library/shutil.rst
+++ b/Doc/library/shutil.rst
@@ -187,7 +187,8 @@
However, this functionality is not available on all platforms.
On platforms where some or all of this functionality is
unavailable, :func:`copy2` will preserve all the metadata
- it can; :func:`copy2` never returns failure.
+ it can; :func:`copy2` never raises an exception because it
+ cannot preserve file metadata.
:func:`copy2` uses :func:`copystat` to copy the file metadata.
Please see :func:`copystat` for more information