[docs] [issue22180] operator.setitem example no longer works in Python 3 due to lazy map

[Roundup Robot]

Roundup Robot added the comment:

New changeset 9c250f34bfa3 by Raymond Hettinger in branch '3.4':
Issue #22180:  Remove weak example
http://hg.python.org/cpython/rev/9c250f34bfa3

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nosy: +python-dev

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<http://bugs.python.org/issue22180>
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