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

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