[docs] [issue20598] argparse docs: '7'.split() is confusing magic

[Martin Panter]

Martin Panter added the comment:

I don’t want to make any controversial changes. Half the purpose of the patch was to let people see what it would look like. Another option would be to only do the single or empty list changes, and leave most of the longer lists as they are with split().

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<http://bugs.python.org/issue20598>
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