BUG: Bug in comparing duplicate frames (GH4421) related
BUG: Bug in describe on duplicate frames
Merge pull request #5194 from jreback/dup_eq

BUG: Bug in comparing duplicate frames (GH4421) related
ENH/API: Accept DataFrame for isin

API: Series should respect index labels.

Dupes on both index and columns

DOC: Update docstring. remove extra line.

TST: Test on multiIndex.

Update what's new to use a DataFrame