A contrived use case:
with open('document.txt', 'r') as io:
(line1, line2, *) = io
It is possible to kind of achieve the same result using `*_` except that would
actually read all the lines from the file, even if we only want the first 2.
…so I am suggesting that we use the bare `*` here to mean that we don't care
whether there are additional items in the sequence, _and_ we want to stop
iterating.
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