[issue1372770] email.Header should preserve original FWS

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

I agree that when dealing with prexisting folding it is better to preserve it.  The case I was talking about is, say, prepending re to a subject and refolding it.  It is the transformation step where I think turning fws into a single space makes sense.  But I absolutly want this to be controllable and hope that experience can inform the chosen defaults.  I also expect to be getting feedback from the mailman folks well before anything gets set in stone.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1372770>
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