[issue27447] python -m doctest script_file_with_no_py_extension produces confusing NameErrors

[towb]

towb added the comment:

Improving the documentation would also be nice, and easier. -m is mentioned in two places, first only as a shortcut for testmod, later with an explanation on name extensions and testfile. At least I didn't get that far.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27447>
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