[PATCH 02 of 10 STABLE] py3: use as_bytes() method of EmailMessage

[Yuya Nishihara]

On Thu, 24 Oct 2019 17:30:33 +0200, Denis Laxalde wrote:
> # HG changeset patch
> # User Denis Laxalde <denis.laxalde at logilab.fr>
> # Date 1570708110 -7200
> #      Thu Oct 10 13:48:30 2019 +0200
> # Branch stable
> # Node ID 07e05c72d451036707ac8c7f9a283617ac9534f8
> # Parent  4e91ce8060e960bd8f9656a1f9b00fdb82199b3c
> py3: use as_bytes() method of EmailMessage

Queued 2, 3, 5, 6, 7, 8, 9, thanks.