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

[Senthil Kumaran]

Senthil Kumaran <senthil at uthcode.com> added the comment:

I merged this one.  All the requirements were met.

@Terry / @ Cheryl - could you please review if I did it right?  Should this be backported to other Python versions?

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resolution:  -> fixed
versions: +Python 3.7 -Python 2.7, Python 3.3, Python 3.4

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<https://bugs.python.org/issue18533>
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