Fix typo in scipy.optimize.newton argument validation
Fix typo in scipy.optimize.newton argument validation

A copy-paste error in #2462 broke `scipy.optimize.newton`. The other
zero-finding functions have an `xtol` keyword argument, whereas `newton`
does not; it has just `tol`.

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