Index: Doc/library/email.mime.rst
===================================================================
--- Doc/library/email.mime.rst	(revision 80019)
+++ Doc/library/email.mime.rst	(working copy)
@@ -192,8 +192,8 @@
    set of the text and is passed as a parameter to the
    :class:`~email.mime.nonmultipart.MIMENonMultipart` constructor; it defaults
    to ``us-ascii``.  No guessing or encoding is performed on the text data.
+   Unicode arguments are unsupported.
 
    .. versionchanged:: 2.4
-      The previously deprecated *_encoding* argument has been removed.  Encoding
-      happens implicitly based on the *_charset* argument.
+      The previously deprecated *_encoding* argument has been removed.