[issue11551] test_dummy_thread.py test coverage improvement

[Denver Coneybeare]

Changes by Denver Coneybeare <denver.coneybeare at gmail.com>:


Added file: http://bugs.python.org/file21206/test_dummy_thread_test_coverage_improvement_v2.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11551>
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