Pr09 batch 1
fixing PR09 missing period formatting errors in various parameter descriptions. 

Subset of #28602, mainly functions with single parameter's missing periods that didn't make sense to open an entire issue for. 

I'm periodically updating the main issue for PR09 with the current list of errors remaining as they're removed. 
pandas/core/reshape/tile.py(278,): error PR05: pandas.qcut: Parameter "labels" type should not finish with "."
 Thanks @HughKelley 