MIMEText.__init__()'s _text argument if it doesn't already end in a
newline. This may be controversial.
minor type and defaults to \mimetype{plain}. \var{_charset} is the
character set of the text and is passed as a parameter to the
\class{MIMENonMultipart} constructor; it defaults to \code{us-ascii}. No
-guessing or encoding is performed on the text data, but a newline is
-appended to \var{_text} if it doesn't already end with a newline.
+guessing or encoding is performed on the text data.
\deprecated{2.2.2}{The \var{_encoding} argument has been deprecated.
Encoding now happens implicitly based on the \var{_charset} argument.}