Backport PR #13057 on branch v3.1.x (Simplify callable(self._contains) checks) - #13497

Backport PR #13057 on branch v3.1.x (Simplify callable(self._contains) checks)#13497

tacaswell merged 1 commit into

matplotlib:v3.1.xmatplotlib/matplotlib:v3.1.xfrom

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