[issue30357] test_thread should clean threads after each test

[STINNER Victor]

STINNER Victor added the comment:


New changeset 44944b602af23712d7119801183cdc6e202e4f76 by Victor Stinner in branch '3.6':
bpo-30387: Fix warning in test_threading (#1634) (#1636)
https://github.com/python/cpython/commit/44944b602af23712d7119801183cdc6e202e4f76


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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30357>
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