FIX: Raise errors when wrong string arguments are passed to `resample`#19307

Merged

jreback merged 8 commits intopandas-dev:masterfrom

cchwala:check_for_correct_label_argument_in_resample

Jan 21, 2018

Commits on Jan 18, 2018

Test that wrong string arguments raise an error
cchwala
committed

Commits on Jan 20, 2018

change string formating, fixed lint problem, mentioned issue number
cchwala
committed

Commits on Jan 21, 2018