[issue19398] test_trace fails with -S

[Terry J. Reedy]

Terry J. Reedy added the comment:

The test should use the more specific assertXyz method:
self.assertIn("pprint.cover", files)

The error message would then be the more informative
AssertionError: 'pprint.cover' not found in <files listed>

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nosy: +terry.reedy

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19398>
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