Fix source encoding for python3 compatibility
Fix source encoding for python3 compatibility

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