BUG: Bug in concatenation with duplicate columns across dtypes not merging with axis=0 (GH4771)#4772

Merged

jreback merged 2 commits intopandas-dev:masterfrom

jreback:concat_dups

Sep 7, 2013

Commits on Sep 7, 2013

BUG: Bug in concatenation with duplicate columns across dtypes not merging with axis=0 (GH4771)
jreback
committed
TST: add append/join tests for merging dup columns
jreback
committed