DOC: fix PR07,RT03,SA01 for pandas.MultiIndex.copy (#59363) #42959

Job	Run time
ASV Benchmarks	20m 11s
Build Docker Dev Environment	2m 29s
Docstring validation, typing, and other manual pre-commit hooks	16m 37s
Test install requirements-dev.txt	2m 24s
	41m 41s

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