[issue18600] email.policy doc example passes 'policy' to as_string, but that doesn't work

[R. David Murray]

R. David Murray added the comment:

Turns out even with as_string accepting a policy keyword, the example still failed.  It needs to be generating a bytes object, not a string.  Before I even realized that, though, I decided I wanted to add as_bytes (and __bytes__).  So the attached patch does that: adds policy to as_string, and adds new methods as_bytes and __bytes__ to Message.

This patch is only for 3.4.  The 3.3 patch will just delete that part of the policy example, so I'm not going to bother to upload it.

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keywords: +patch
stage: needs patch -> patch review
Added file: http://bugs.python.org/file31209/as_string_policy.patch

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