PERF: Add if branch for empty sep in str.cat#26605

Merged

jreback merged 3 commits intopandas-dev:masterfrom

h-vetinari:str_cat_perf

Jul 31, 2019

Commits on Jul 29, 2019

PERF: Add if branch for empty sep in str.cat
h-vetinari
committed

Commits on Jul 30, 2019