pythongh-76637: Note that undefined Codec is for testing (python#136531)

StanFromIreland · taegyunkim · commit c68852987d14 · 2025-07-29T10:54:05.000-04:00
Closes python#76637
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
@@ -1395,7 +1395,11 @@ encodings.
 |                    |         | It is used in the Python  |
 |                    |         | pickle protocol.          |
 +--------------------+---------+---------------------------+
-| undefined          |         | Raise an exception for    |
+| undefined          |         | This Codec should only    |
+|                    |         | be used for testing       |
+|                    |         | purposes.                 |
+|                    |         |                           |
+|                    |         | Raise an exception for    |
 |                    |         | all conversions, even     |
 |                    |         | empty strings. The error  |
 |                    |         | handler is ignored.       |
