[docs] [issue22317] action argument is not documented in argparse add_subparser() docs

[Roundup Robot]

Roundup Robot added the comment:

New changeset 430236ef507b by Berker Peksag in branch '2.7':
Issue #22317: Document the action parameter in ArgumentParser.add_subparsers() docs.
https://hg.python.org/cpython/rev/430236ef507b

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue22317>
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