[docs] [issue16863] Python 2 error in Argparse tutorial

[Terry J. Reedy]

Terry J. Reedy added the comment:

Once this discrepancy is explained
(3.x) prog.py: error: the following arguments are required: echo
(2.7) prog.py: error: too few arguments
I agree with leaving the 3.x version in the tutorial.  A normal output discrepany might be a different matter.

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resolution:  -> fixed
stage: needs patch -> resolved
status: open -> closed

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<http://bugs.python.org/issue16863>
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