[issue18533] Avoid error from repr() of recursive dictview

[Ben North]

Changes by Ben North <ben at redfrontdoor.org>:


Added file: http://bugs.python.org/file31088/against-6e1dd1ce95b8-2.7-1.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18533>
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