Fixed doctest for xy-reindexing.
Fixed doctest for xy-reindexing.

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