[issue41280] lru_cache on 0-arity functions should default to maxsize=None

[Karthikeyan Singaravelan]

Change by Karthikeyan Singaravelan <tir.karthi at gmail.com>:


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nosy: +rhettinger

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue41280>
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