[issue29204] Add code deprecations in ElementTree

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset 762ec97ea68a1126b8855996c61fa8239dc9fff7 by Serhiy Storchaka in branch 'master':
bpo-29204: Emit warnings for already deprecated ElementTree features. (#773)
https://github.com/python/cpython/commit/762ec97ea68a1126b8855996c61fa8239dc9fff7


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<http://bugs.python.org/issue29204>
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