[issue18038] Unhelpful error message on invalid encoding specification

[Roundup Robot]

Roundup Robot added the comment:

New changeset 19bc00996e74 by R David Murray in branch '3.3':
#18038: Use non-deprecated assert names in tests.
http://hg.python.org/cpython/rev/19bc00996e74

New changeset 29e7f6a2dc0d by R David Murray in branch 'default':
Null merge #18038: Use non-deprecated assert names in tests.
http://hg.python.org/cpython/rev/29e7f6a2dc0d

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18038>
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