[TST] Add a unit test for optimize.check_grad
[TST] Add a unit test for optimize.check_grad

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