[issue18538] `python -m dis ` should use argparse

[Terry J. Reedy]

Changes by Terry J. Reedy <tjreedy at udel.edu>:


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title: `python -m dis ` relying on argparse -> `python -m dis ` should use argparse
versions: +Python 3.4 -Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18538>
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