[issue19814] Document prefix matching behavior of argparse, particularly for parse_known_args

[Roundup Robot]

Roundup Robot added the comment:

New changeset 181ced5bf0be by Eli Bendersky in branch '2.7':
Issue #19814: Clarify argparse's docs w.r.t prefix matching
http://hg.python.org/cpython/rev/181ced5bf0be

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19814>
_______________________________________