Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
error replacement returned by codec error callbacks twice in
IncrementalEncoder and StreamWriter.
diff --git a/Misc/NEWS b/Misc/NEWS
index 8e9fbf4..c7b203d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -58,6 +58,10 @@
Library
-------
+- Issue #5640: Fix _multibytecodec so that CJK codecs don't repeat
+ error substitutions from non-strict codec error callbacks in
+ incrementalencoder and StreamWriter.
+
- Issue #5656: Fix the coverage reporting when running the test suite with
the -T argument.