Changed to open file as a context.
Changed to open file as a context.

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