Fixed d8_active_link doctest for new numbering.
Fixed d8_active_link doctest for new numbering.

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