BUG: Break reference from grouping level to MI#31133

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jreback merged 4 commits intopandas-dev:masterfrom

TomAugspurger:31068-groupby-mi-level-name

Jan 20, 2020

Commits on Jan 19, 2020

BUG: Break reference from grouping level to MI
TomAugspurger
committed

Commits on Jan 20, 2020