problems with mimify.mime_encode_header

[Marc 'BlackJack' Rintsch]

In <mailman.7617.1151590377.27775.python-list at python.org>, Egor Duda
wrote:

> #!/usr/bin/python
> # -*- coding: utf-8 -*-
> 
> import mimify
> 
> mimify.CHARSET = 'utf-8'
> 
> print mimify.mime_encode_header('Subject: тест а.\n');
> 
> Тhe output is:
> Subject: =?utf-8?Q?=D1=82=D0=B5=D1=81=D1=82?= а.
> 
> Please note that the last character (before dot) is not quoted, and
> resulting string is not 8bit clean.

Why should a simple ASCII 'a' be quoted?  And what do you mean by "not
8bit clean"?  The string is even 7-bit clean!

Ciao,
	Marc 'BlackJack' Rintsch