gh-138952: Document platform.machine() output casing inconsistency across platforms...

Co-authored-by: AN Long <aisk@users.noreply.github.com>

diff --git a/Doc/library/platform.rst b/Doc/library/platform.rst
index 88affb5eea2b595a935c28f587c12427e8690a46..d05c6e5a2aa22c2d9b7969c8bfbd81a5d29fbce2 100644 (file)
--- a/Doc/library/platform.rst
+++ b/Doc/library/platform.rst
@@ -56,6 +56,8 @@ Cross platform
    Returns the machine type, e.g. ``'AMD64'``. An empty string is returned if the
    value cannot be determined.
 
+   The output is platform-dependent and may differ in casing and naming conventions.
+
 
 .. function:: node()