Minor changes to hierarchy.to_tree.
Minor changes to hierarchy.to_tree.

ndchorley/scipy,jjhelmus/scipy,gef756/scipy,mortonjt/scipy,josephcslater/scipy,andim/scipy,vigna/scipy,giorgiop/scipy,anntzer/scipy,gertingold/scipy,jsilter/scipy,anntzer/scipy,lukauskas/scipy,jakevdp/scipy,person142/scipy,mikebenfield/scipy,mingwpy/scipy,Eric89GXL/scipy,zerothi/scipy,niknow/scipy,witcxc/scipy,Kamp9/scipy,aeklant/scipy,kalvdans/scipy,lhilt/scipy,hainm/scipy,kleskjr/scipy,jseabold/scipy,niknow/scipy,maciejkula/scipy,vberaudi/scipy,piyush0609/scipy,jjhelmus/scipy,Newman101/scipy,woodscn/scipy,mhogg/scipy,mdhaber/scipy,Gillu13/scipy,dch312/scipy,njwilson23/scipy,mortonjt/scipy,scipy/scipy,jseabold/scipy,pbrod/scipy,maciejkula/scipy,argriffing/scipy,mingwpy/scipy,ogrisel/scipy,rmcgibbo/scipy,ChanderG/scipy,teoliphant/scipy,argriffing/scipy,maniteja123/scipy,WillieMaddox/scipy,sargas/scipy,sriki18/scipy,Dapid/scipy,mgaitan/scipy,trankmichael/scipy,pizzathief/scipy,juliantaylor/scipy,Kamp9/scipy,mdhaber/scipy,apbard/scipy,andyfaff/scipy,fredrikw/scipy,anielsen001/scipy,nonhermitian/scipy,ales-erjavec/scipy,Gillu13/scipy,pnedunuri/scipy,vberaudi/scipy,Srisai85/scipy,petebachant/scipy,surhudm/scipy,zerothi/scipy,mingwpy/scipy,newemailjdm/scipy,Srisai85/scipy,perimosocordiae/scipy,mhogg/scipy,kleskjr/scipy,surhudm/scipy,richardotis/scipy,grlee77/scipy,raoulbq/scipy,juliantaylor/scipy,mgaitan/scipy,nvoron23/scipy,futurulus/scipy,pnedunuri/scipy,mortada/scipy,sriki18/scipy,larsmans/scipy,mhogg/scipy,behzadnouri/scipy,Shaswat27/scipy,arokem/scipy,rmcgibbo/scipy,ChanderG/scipy,richardotis/scipy,pnedunuri/scipy,raoulbq/scipy,jakevdp/scipy,mortada/scipy,ndchorley/scipy,andyfaff/scipy,nvoron23/scipy,piyush0609/scipy,WillieMaddox/scipy,pyramania/scipy,jseabold/scipy,mhogg/scipy,chatcannon/scipy,jseabold/scipy,endolith/scipy,pyramania/scipy,befelix/scipy,lhilt/scipy,trankmichael/scipy,nonhermitian/scipy,josephcslater/scipy,arokem/scipy,mortada/scipy,vhaasteren/scipy,woodscn/scipy,pnedunuri/scipy,jseabold/scipy,newemailjdm/scipy,giorgiop/scipy,arokem/scipy,jsilter/scipy,vigna/scipy,richardotis/scipy,ChanderG/scipy,andyfaff/scipy,gef756/scipy,nmayorov/scipy,mgaitan/scipy,mdhaber/scipy,teoliphant/scipy,vanpact/scipy,jonycgn/scipy,larsmans/scipy,anielsen001/scipy,apbard/scipy,endolith/scipy,nmayorov/scipy,sauliusl/scipy,zxsted/scipy,matthew-brett/scipy,vigna/scipy,ilayn/scipy,sargas/scipy,aeklant/scipy,mtrbean/scipy,zerothi/scipy,lhilt/scipy,vigna/scipy,argriffing/scipy,gfyoung/scipy,futurulus/scipy,vhaasteren/scipy,ales-erjavec/scipy,larsmans/scipy,andim/scipy,mtrbean/scipy,aeklant/scipy,witcxc/scipy,mortonjt/scipy,lhilt/scipy,aarchiba/scipy,josephcslater/scipy,matthewalbani/scipy,tylerjereddy/scipy,fredrikw/scipy,Eric89GXL/scipy,Srisai85/scipy,matthew-brett/scipy,matthew-brett/scipy,FRidh/scipy,bkendzior/scipy,sargas/scipy,zerothi/scipy,haudren/scipy,anntzer/scipy,ortylp/scipy,petebachant/scipy,grlee77/scipy,sauliusl/scipy,e-q/scipy,perimosocordiae/scipy,zxsted/scipy,raoulbq/scipy,cpaulik/scipy,WillieMaddox/scipy,vberaudi/scipy,raoulbq/scipy,bkendzior/scipy,surhudm/scipy,juliantaylor/scipy,jamestwebber/scipy,witcxc/scipy,jor-/scipy,WarrenWeckesser/scipy,aarchiba/scipy,mtrbean/scipy,matthew-brett/scipy,minhlongdo/scipy,fernand/scipy,larsmans/scipy,sriki18/scipy,FRidh/scipy,Dapid/scipy,pnedunuri/scipy,woodscn/scipy,piyush0609/scipy,kleskjr/scipy,pschella/scipy,endolith/scipy,zxsted/scipy,jsilter/scipy,juliantaylor/scipy,Shaswat27/scipy,petebachant/scipy,piyush0609/scipy,behzadnouri/scipy,cpaulik/scipy,gertingold/scipy,ogrisel/scipy,arokem/scipy,Newman101/scipy,trankmichael/scipy,perimosocordiae/scipy,efiring/scipy,pschella/scipy,e-q/scipy,niknow/scipy,dch312/scipy,mikebenfield/scipy,andim/scipy,bkendzior/scipy,gdooper/scipy,scipy/scipy,tylerjereddy/scipy,Dapid/scipy,andyfaff/scipy,pyramania/scipy,hainm/scipy,pschella/scipy,minhlongdo/scipy,trankmichael/scipy,rgommers/scipy,behzadnouri/scipy,aarchiba/scipy,tylerjereddy/scipy,gertingold/scipy,behzadnouri/scipy,gfyoung/scipy,trankmichael/scipy,FRidh/scipy,person142/scipy,felipebetancur/scipy,rgommers/scipy,giorgiop/scipy,vanpact/scipy,mgaitan/scipy,Stefan-Endres/scipy,vhaasteren/scipy,ogrisel/scipy,WillieMaddox/scipy,grlee77/scipy,andim/scipy,surhudm/scipy,WillieMaddox/scipy,jjhelmus/scipy,petebachant/scipy,sauliusl/scipy,scipy/scipy,giorgiop/scipy,fernand/scipy,Gillu13/scipy,mdhaber/scipy,mdhaber/scipy,zaxliu/scipy,mdhaber/scipy,anielsen001/scipy,raoulbq/scipy,ilayn/scipy,giorgiop/scipy,mikebenfield/scipy,pizzathief/scipy,aman-iitj/scipy,haudren/scipy,mikebenfield/scipy,witcxc/scipy,zaxliu/scipy,ortylp/scipy,ortylp/scipy,cpaulik/scipy,woodscn/scipy,zaxliu/scipy,cpaulik/scipy,ales-erjavec/scipy,jjhelmus/scipy,perimosocordiae/scipy,fredrikw/scipy,FRidh/scipy,WarrenWeckesser/scipy,teoliphant/scipy,sonnyhu/scipy,Gillu13/scipy,hainm/scipy,maniteja123/scipy,befelix/scipy,hainm/scipy,FRidh/scipy,minhlongdo/scipy,anntzer/scipy,ogrisel/scipy,mingwpy/scipy,richardotis/scipy,sauliusl/scipy,chatcannon/scipy,nonhermitian/scipy,woodscn/scipy,sargas/scipy,scipy/scipy,lhilt/scipy,kalvdans/scipy,trankmichael/scipy,ndchorley/scipy,futurulus/scipy,vanpact/scipy,vhaasteren/scipy,lukauskas/scipy,andim/scipy,zxsted/scipy,surhudm/scipy,richardotis/scipy,felipebetancur/scipy,sonnyhu/scipy,sonnyhu/scipy,kalvdans/scipy,nvoron23/scipy,juliantaylor/scipy,nmayorov/scipy,pyramania/scipy,Shaswat27/scipy,rmcgibbo/scipy,endolith/scipy,aman-iitj/scipy,rmcgibbo/scipy,surhudm/scipy,niknow/scipy,fredrikw/scipy,ChanderG/scipy,niknow/scipy,zxsted/scipy,WarrenWeckesser/scipy,Kamp9/scipy,jjhelmus/scipy,mhogg/scipy,mtrbean/scipy,mgaitan/scipy,teoliphant/scipy,pschella/scipy,felipebetancur/scipy,felipebetancur/scipy,sauliusl/scipy,fernand/scipy,befelix/scipy,pizzathief/scipy,pbrod/scipy,chatcannon/scipy,jamestwebber/scipy,jakevdp/scipy,WarrenWeckesser/scipy,vberaudi/scipy,anielsen001/scipy,dch312/scipy,Newman101/scipy,niknow/scipy,argriffing/scipy,dominicelse/scipy,Eric89GXL/scipy,giorgiop/scipy,aarchiba/scipy,aman-iitj/scipy,perimosocordiae/scipy,lukauskas/scipy,jor-/scipy,sargas/scipy,sonnyhu/scipy,efiring/scipy,nonhermitian/scipy,njwilson23/scipy,teoliphant/scipy,person142/scipy,mortada/scipy,gef756/scipy,apbard/scipy,fredrikw/scipy,pbrod/scipy,Srisai85/scipy,zerothi/scipy,dominicelse/scipy,chatcannon/scipy,Shaswat27/scipy,jonycgn/scipy,arokem/scipy,maniteja123/scipy,Newman101/scipy,piyush0609/scipy,ales-erjavec/scipy,jor-/scipy,ortylp/scipy,WarrenWeckesser/scipy,mikebenfield/scipy,dominicelse/scipy,argriffing/scipy,maniteja123/scipy,larsmans/scipy,pschella/scipy,ales-erjavec/scipy,njwilson23/scipy,mortonjt/scipy,gertingold/scipy,cpaulik/scipy,chatcannon/scipy,Stefan-Endres/scipy,anntzer/scipy,gdooper/scipy,mtrbean/scipy,futurulus/scipy,josephcslater/scipy,vhaasteren/scipy,raoulbq/scipy,person142/scipy,njwilson23/scipy,richardotis/scipy,gdooper/scipy,jamestwebber/scipy,scipy/scipy,Gillu13/scipy,aarchiba/scipy,aman-iitj/scipy,matthewalbani/scipy,fernand/scipy,gdooper/scipy,mingwpy/scipy,mtrbean/scipy,Srisai85/scipy,efiring/scipy,matthew-brett/scipy,ChanderG/scipy,zxsted/scipy,aeklant/scipy,Eric89GXL/scipy,e-q/scipy,jonycgn/scipy,zerothi/scipy,larsmans/scipy,efiring/scipy,sriki18/scipy,maciejkula/scipy,mortada/scipy,rmcgibbo/scipy,Kamp9/scipy,mortonjt/scipy,pizzathief/scipy,vigna/scipy,ales-erjavec/scipy,lukauskas/scipy,josephcslater/scipy,cpaulik/scipy,felipebetancur/scipy,mortada/scipy,ilayn/scipy,jor-/scipy,vanpact/scipy,pizzathief/scipy,aman-iitj/scipy,newemailjdm/scipy,WillieMaddox/scipy,newemailjdm/scipy,nmayorov/scipy,pnedunuri/scipy,anielsen001/scipy,minhlongdo/scipy,Stefan-Endres/scipy,dominicelse/scipy,gfyoung/scipy,fernand/scipy,nvoron23/scipy,newemailjdm/scipy,nvoron23/scipy,njwilson23/scipy,behzadnouri/scipy,vanpact/scipy,haudren/scipy,Stefan-Endres/scipy,petebachant/scipy,kleskjr/scipy,matthewalbani/scipy,jsilter/scipy,ndchorley/scipy,minhlongdo/scipy,befelix/scipy,jakevdp/scipy,ilayn/scipy,futurulus/scipy,WarrenWeckesser/scipy,lukauskas/scipy,vanpact/scipy,Gillu13/scipy,grlee77/scipy,ndchorley/scipy,ortylp/scipy,ndchorley/scipy,Dapid/scipy,efiring/scipy,gef756/scipy,sriki18/scipy,mhogg/scipy,haudren/scipy,Dapid/scipy,Srisai85/scipy,jor-/scipy,Shaswat27/scipy,sonnyhu/scipy,Newman101/scipy,rgommers/scipy,jamestwebber/scipy,Kamp9/scipy,kleskjr/scipy,fredrikw/scipy,behzadnouri/scipy,jsilter/scipy,anntzer/scipy,efiring/scipy,mingwpy/scipy,chatcannon/scipy,e-q/scipy,matthewalbani/scipy,argriffing/scipy,Newman101/scipy,witcxc/scipy,Shaswat27/scipy,kalvdans/scipy,rgommers/scipy,scipy/scipy,nvoron23/scipy,futurulus/scipy,newemailjdm/scipy,woodscn/scipy,ilayn/scipy,haudren/scipy,andyfaff/scipy,e-q/scipy,endolith/scipy,maciejkula/scipy,dominicelse/scipy,jamestwebber/scipy,matthewalbani/scipy,dch312/scipy,fernand/scipy,rmcgibbo/scipy,Eric89GXL/scipy,grlee77/scipy,piyush0609/scipy,ilayn/scipy,gef756/scipy,gfyoung/scipy,felipebetancur/scipy,bkendzior/scipy,ChanderG/scipy,pbrod/scipy,andim/scipy,jakevdp/scipy,maniteja123/scipy,lukauskas/scipy,petebachant/scipy,endolith/scipy,nmayorov/scipy,aman-iitj/scipy,dch312/scipy,sriki18/scipy,Kamp9/scipy,gertingold/scipy,perimosocordiae/scipy,mgaitan/scipy,rgommers/scipy,vberaudi/scipy,apbard/scipy,person142/scipy,gef756/scipy,njwilson23/scipy,vhaasteren/scipy,hainm/scipy,anielsen001/scipy,Stefan-Endres/scipy,ortylp/scipy,Dapid/scipy,jseabold/scipy,maniteja123/scipy,sauliusl/scipy,jonycgn/scipy,nonhermitian/scipy,kleskjr/scipy,jonycgn/scipy,minhlongdo/scipy,haudren/scipy,zaxliu/scipy,hainm/scipy,Eric89GXL/scipy,FRidh/scipy,kalvdans/scipy,andyfaff/scipy,pyramania/scipy,ogrisel/scipy,zaxliu/scipy,aeklant/scipy,tylerjereddy/scipy,zaxliu/scipy,pbrod/scipy,jonycgn/scipy,maciejkula/scipy,Stefan-Endres/scipy,pbrod/scipy,mortonjt/scipy,sonnyhu/scipy,tylerjereddy/scipy,befelix/scipy,gfyoung/scipy,apbard/scipy,gdooper/scipy,vberaudi/scipy,bkendzior/scipy