Fix bug in warning that raises TypeError (#1346)
Fix bug in warning that raises TypeError (#1346)

Co-authored-by: Brandon T. Willard <2e70f62848c6c848fdc464dfe4e365aeef232504@users.noreply.github.com>
arviz-devs/arviz,arviz-devs/arviz,arviz-devs/arviz,arviz-devs/arviz