Changed to convert set to list for Python 3.
Changed to convert set to list for Python 3.

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