Skip warning test in module docstring.
Skip warning test in module docstring.

cmshobe/landlab,amandersillinois/landlab,Carralex/landlab,cmshobe/landlab,landlab/landlab,Carralex/landlab,cmshobe/landlab,landlab/landlab,amandersillinois/landlab,landlab/landlab,Carralex/landlab