Add NEWS entry about issue #3739.
diff --git a/Misc/NEWS b/Misc/NEWS
index 604c0df..2b05c00 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -279,6 +279,9 @@
   step. This avoids problems with counting UTF-8 bytes that ignores the effect
   of using the replace error handler in PyUnicode_DecodeUTF8().
 
+- Issue #3739: The unicode-internal encoder now reports the number of characters
+  consumed like any other encoder (instead of the number of bytes).
+
 Library
 -------