REF: re-use sanitize_array in DataFrame._sanitize_columns #41611
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A big partial-indexing test is split and has a non-trivial diff, but the only actual change is this line https://github.com/pandas-dev/pandas/compare/master...jbrockmendel:ref-sanitize_column?expand=1#diff-1723bf927d192314f9d8c4faa220e26b1c3b39c2fe3bb65d8c43966ec7e596e8R430 declaring that empty range is int-dtype-like instead of float-dtype-like, which i think we should call a bug.