[issue26915] Test identity first in membership operation of ItemsView, ValuesView and Sequence in collections.abc

[Serhiy Storchaka]

Changes by Serhiy Storchaka <storchaka at gmail.com>:


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assignee:  -> rhettinger
nosy: +serhiy.storchaka

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26915>
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