email.encoders.encode_base64 creates one line only

[spam at uce.gov]

This is with python 3.1.2 (r312:79147). I have not tried with 2.7.

When I create an attachment with email.mime.image.MIMEImage, by default it 
uses email.encoders.encode_base64 for the encoder, but that results in a 
single line base64 string, instead of the recommended multiple 76-chars lines.

This works with most MTA and MUA, but some of them choke on it.

Is this a bug, or do I need to write my own _encoder?

-- 
Yves.                                                  http://www.SollerS.ca/
                                                        http://blog.zioup.org/