Fix PEP8 issues in Cuthill-McKee ordering tests
Fix PEP8 issues in Cuthill-McKee ordering tests

ghdk/networkx,nathania/networkx,jni/networkx,RMKD/networkx,dhimmel/networkx,dmoliveira/networkx,chrisnatali/networkx,jcurbelo/networkx,michaelpacer/networkx,JamesClough/networkx,farhaanbukhsh/networkx,harlowja/networkx,dhimmel/networkx,dhimmel/networkx,goulu/networkx,beni55/networkx,dmoliveira/networkx,jni/networkx,chrisnatali/networkx,aureooms/networkx,ghdk/networkx,wasade/networkx,andnovar/networkx,kernc/networkx,farhaanbukhsh/networkx,blublud/networkx,cmtm/networkx,debsankha/networkx,kernc/networkx,ionanrozenfeld/networkx,chrisnatali/networkx,jakevdp/networkx,ltiao/networkx,ionanrozenfeld/networkx,blublud/networkx,sharifulgeo/networkx,RMKD/networkx,ionanrozenfeld/networkx,harlowja/networkx,bzero/networkx,sharifulgeo/networkx,ghdk/networkx,kernc/networkx,RMKD/networkx,jni/networkx,blublud/networkx,aureooms/networkx,jakevdp/networkx,nathania/networkx,yashu-seth/networkx,farhaanbukhsh/networkx,tmilicic/networkx,nathania/networkx,jfinkels/networkx,harlowja/networkx,bzero/networkx,debsankha/networkx,jakevdp/networkx,bzero/networkx,SanketDG/networkx,debsankha/networkx,dmoliveira/networkx,Sixshaman/networkx,OrkoHunter/networkx,NvanAdrichem/networkx,aureooms/networkx,sharifulgeo/networkx