[docs] [issue14034] Add argparse howto

[Tshepang Lekhonkhobe]

Tshepang Lekhonkhobe <tshepang at gmail.com> added the comment:

Okay, there was some bad markup on my version 2. Lemme fix.

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Added file: http://bugs.python.org/file24938/argparse_howto2.patch

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