[issue20654] Pydoc (and help) fails with socket.AddressFamily

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

The fix itself looks good, but the test can be better. You write temporary file in current directory. this can fail for different reasons, Python can crash and left undeleted file, this file can overwrite existing file. The render_doc() function is last module level function in a traceback, and it can be used for testing, temporary file will be not needed.

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<http://bugs.python.org/issue20654>
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