Cleaned-up docstrings.
Cleaned-up docstrings.

Cleaned-up docstrings and added parameter descriptions.

RondaStrauch/landlab,ManuSchmi88/landlab,Carralex/landlab,cmshobe/landlab,SiccarPoint/landlab,amandersillinois/landlab,ManuSchmi88/landlab,Carralex/landlab,RondaStrauch/landlab,landlab/landlab,landlab/landlab,cmshobe/landlab,RondaStrauch/landlab,csherwood-usgs/landlab,laijingtao/landlab,cmshobe/landlab,laijingtao/landlab,amandersillinois/landlab,ManuSchmi88/landlab,csherwood-usgs/landlab,Carralex/landlab,SiccarPoint/landlab,landlab/landlab