paul j3 added the comment:
`parse_args` just calls `parse_known_args`, and then raises an error if `rest`
is not empty. So it is `parse_known_args` that is doing the abbreviation
matching.
Abbreviation matching is done relatively early, when `_parse_known_args` first
loops through the strings, trying to decide which are arguments ('A') and which
are options ('O'). This matching is done in `_parse_optional`. It's not
something it does at the end on the 'leftovers'.
http://bugs.python.org/issue14910, a disable abbreviation option, might be a
better solution. Your example is an argument in favor of implementing that
feature.
Unless a reader has your example in mind, the proposed documentation warning
might be more confusing than helpful.
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nosy: +paul.j3
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