REF: unify Index union methods#38382

Merged

jreback merged 8 commits intopandas-dev:masterfrom

jbrockmendel:ref-setops-49

Dec 14, 2020

Commits on Dec 8, 2020

REF: share IntervalIndex.intersection with Index.intersection
jbrockmendel
committed

Commits on Dec 13, 2020

Merge branch 'master' of https://github.com/pandas-dev/pandas into ref-setops-49
jbrockmendel
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Commits on Dec 14, 2020