Fix doc template for preflow-push maxflow algorithm
Fix doc template for preflow-push maxflow algorithm

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