[issue18010] pydoc search chokes on import errors

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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stage: needs patch -> test needed
versions: +Python 3.5, Python 3.6 -Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18010>
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