[issue36520] Email header folded incorrectly

[Jeffrey Kintscher]

Jeffrey Kintscher <websurfer at surf2c.net> added the comment:

To aid with debugging the code, the Subject line can be simplified:

>>> from email.message import EmailMessage
>>> m = EmailMessage()
>>> m['Subject'] = 'Hello =?utf-8?q?W=C3=B6rld!_Hello_W=C3=B6rld!_Hello_W=C3=B6rld!?= Hello Wörld!Hello Wörld!'
>>> print(bytes(m))
b'Subject: Hello =?utf-8?q?W=C3=B6rld!_Hello_W=C3=B6rld!_Hello_W=C3=B6rld!?=\n Hello =?utf-8?=?utf-8?q?q=3FW=3DC3=3DB6rld!Hello=3F=3D_W=C3=B6rld!?=\n\n'

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36520>
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