#17714: document that the base64 codec adds a trailing newline.
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index 9e1a9c7..87c2b39 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -1194,7 +1194,9 @@
| Codec | Aliases | Purpose |
+====================+===========================+===========================+
| base64_codec | base64, base-64 | Convert operand to MIME |
-| | | base64 |
+| | | base64 (the result always |
+| | | includes a trailing |
+| | | ``'\n'``) |
+--------------------+---------------------------+---------------------------+
| bz2_codec | bz2 | Compress the operand |
| | | using bz2 |