[issue20026] sqlite: handle correctly invalid isolation_level

[Roundup Robot]

Roundup Robot added the comment:

New changeset 572e4b054899 by Victor Stinner in branch '2.7':
Issue #20026: Fix the sqlite module to handle correctly invalid isolation level
http://hg.python.org/cpython/rev/572e4b054899

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue20026>
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