[issue31256] xml.etree.ElementTree: add support for doctype in tostring method

[Bernt Røskar Brenna]

Bernt Røskar Brenna <bernt.brenna at gmail.com> added the comment:

See also: https://bugs.python.org/issue36227

PR: https://github.com/python/cpython/pull/12225

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nosy: +Bernt.Røskar.Brenna

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