[issue11174] add argparse formatting option to display type names for metavar

[Roundup Robot]

Roundup Robot <devnull at devnull> added the comment:

New changeset a15d65d8f269 by Steven Bethard in branch 'default':
Issue #11174: Add argparse.MetavarTypeHelpFormatter, which uses type names
http://hg.python.org/cpython/rev/a15d65d8f269

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nosy: +python-dev

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<http://bugs.python.org/issue11174>
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