[issue28201] dict: perturb shift should be done when first conflict

[Roundup Robot]

Roundup Robot added the comment:

New changeset cf2778fd7acb by INADA Naoki in branch '3.6':
Issue #28201: Dict reduces possibility of 2nd conflict in hash table.
https://hg.python.org/cpython/rev/cf2778fd7acb

New changeset 80b01cd94a63 by INADA Naoki in branch 'default':
Issue #28201: Dict reduces possibility of 2nd conflict in hash table.
https://hg.python.org/cpython/rev/80b01cd94a63

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28201>
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