DOC: r match function
Update comparison_with_r.rst

rm index
Update comparison_with_r.rst
Update comparison_with_r.rst
BUG/API: autocorrelation_plot should accept kwargs
BUG: Panel.to_frame() with MultiIndex major axis

Fixes bug that caused failure on Panel.to_frame()
if major_axis was a MultiIndex (#5402)

refactor reindexing to index.py

API/REF: refactor bits to index. rename
Merge pull request #5623 from TomAugspurger/autocorr_kwds

BUG/API: autocorrelation_plot should accept kwargs
Merge pull request #5417 from TomAugspurger/to-frame-multi

BUG: Panel.to_frame() with MultiIndex major axis
Merge pull request #5875 from chappers/r-isin

DOC: Add %in% operator into compare w r (GH3850)
ENH: Improve perf of str_extract

Simplify; iterate over arrs directly.

Simplify code