added another test for tr on density op of spin states
added another test for tr on density op of spin states

ga7g08/sympy,grevutiu-gabriel/sympy,atreyv/sympy,vipulroxx/sympy,Gadal/sympy,ChristinaZografou/sympy,shipci/sympy,abhiii5459/sympy,diofant/diofant,MridulS/sympy,moble/sympy,pandeyadarsh/sympy,emon10005/sympy,chaffra/sympy,rahuldan/sympy,Arafatk/sympy,pbrady/sympy,kaichogami/sympy,sahilshekhawat/sympy,jerli/sympy,jbbskinny/sympy,wyom/sympy,sampadsaha5/sympy,aktech/sympy,moble/sympy,pbrady/sympy,flacjacket/sympy,Vishluck/sympy,Titan-C/sympy,sahmed95/sympy,Shaswat27/sympy,maniteja123/sympy,abhiii5459/sympy,srjoglekar246/sympy,grevutiu-gabriel/sympy,lindsayad/sympy,asm666/sympy,wanglongqi/sympy,maniteja123/sympy,cswiercz/sympy,kaushik94/sympy,postvakje/sympy,Shaswat27/sympy,bukzor/sympy,madan96/sympy,beni55/sympy,shikil/sympy,mcdaniel67/sympy,dqnykamp/sympy,Shaswat27/sympy,jerli/sympy,garvitr/sympy,asm666/sympy,farhaanbukhsh/sympy,iamutkarshtiwari/sympy,drufat/sympy,MechCoder/sympy,Curious72/sympy,Gadal/sympy,ChristinaZografou/sympy,wyom/sympy,maniteja123/sympy,kevalds51/sympy,toolforger/sympy,abloomston/sympy,abloomston/sympy,kaichogami/sympy,vipulroxx/sympy,MridulS/sympy,cccfran/sympy,saurabhjn76/sympy,ahhda/sympy,ahhda/sympy,cccfran/sympy,emon10005/sympy,yukoba/sympy,amitjamadagni/sympy,pbrady/sympy,garvitr/sympy,saurabhjn76/sympy,jamesblunt/sympy,oliverlee/sympy,mafiya69/sympy,sahilshekhawat/sympy,sunny94/temp,liangjiaxing/sympy,jaimahajan1997/sympy,Vishluck/sympy,skidzo/sympy,Titan-C/sympy,yashsharan/sympy,debugger22/sympy,chaffra/sympy,jerli/sympy,shipci/sympy,madan96/sympy,liangjiaxing/sympy,hrashk/sympy,sampadsaha5/sympy,abloomston/sympy,kevalds51/sympy,Davidjohnwilson/sympy,hargup/sympy,Curious72/sympy,AunShiLord/sympy,sampadsaha5/sympy,debugger22/sympy,MechCoder/sympy,Sumith1896/sympy,kmacinnis/sympy,wanglongqi/sympy,ahhda/sympy,drufat/sympy,sahmed95/sympy,amitjamadagni/sympy,meghana1995/sympy,hargup/sympy,drufat/sympy,Davidjohnwilson/sympy,oliverlee/sympy,farhaanbukhsh/sympy,jbbskinny/sympy,garvitr/sympy,shipci/sympy,jaimahajan1997/sympy,Sumith1896/sympy,farhaanbukhsh/sympy,bukzor/sympy,hrashk/sympy,meghana1995/sympy,kmacinnis/sympy,Mitchkoens/sympy,Vishluck/sympy,kumarkrishna/sympy,atsao72/sympy,lindsayad/sympy,ChristinaZografou/sympy,skidzo/sympy,moble/sympy,kevalds51/sympy,jbbskinny/sympy,dqnykamp/sympy,jaimahajan1997/sympy,atreyv/sympy,Arafatk/sympy,sunny94/temp,shikil/sympy,VaibhavAgarwalVA/sympy,cswiercz/sympy,sunny94/temp,Arafatk/sympy,souravsingh/sympy,cswiercz/sympy,chaffra/sympy,rahuldan/sympy,Mitchkoens/sympy,wanglongqi/sympy,madan96/sympy,rahuldan/sympy,mafiya69/sympy,kaushik94/sympy,Sumith1896/sympy,AunShiLord/sympy,aktech/sympy,Designist/sympy,iamutkarshtiwari/sympy,yukoba/sympy,debugger22/sympy,kumarkrishna/sympy,kaichogami/sympy,Gadal/sympy,souravsingh/sympy,asm666/sympy,grevutiu-gabriel/sympy,oliverlee/sympy,mcdaniel67/sympy,bukzor/sympy,kumarkrishna/sympy,yashsharan/sympy,Curious72/sympy,ga7g08/sympy,skirpichev/omg,toolforger/sympy,kaushik94/sympy,aktech/sympy,mafiya69/sympy,skidzo/sympy,atsao72/sympy,shikil/sympy,beni55/sympy,AunShiLord/sympy,Mitchkoens/sympy,Designist/sympy,lindsayad/sympy,sahmed95/sympy,atreyv/sympy,liangjiaxing/sympy,sahilshekhawat/sympy,VaibhavAgarwalVA/sympy,jamesblunt/sympy,AkademieOlympia/sympy,lidavidm/sympy,jamesblunt/sympy,lidavidm/sympy,kmacinnis/sympy,saurabhjn76/sympy,lidavidm/sympy,AkademieOlympia/sympy,souravsingh/sympy,dqnykamp/sympy,pandeyadarsh/sympy,Designist/sympy,yukoba/sympy,postvakje/sympy,AkademieOlympia/sympy,wyom/sympy,hargup/sympy,VaibhavAgarwalVA/sympy,emon10005/sympy,atsao72/sympy,toolforger/sympy,meghana1995/sympy,iamutkarshtiwari/sympy,pandeyadarsh/sympy,MridulS/sympy,ga7g08/sympy,MechCoder/sympy,vipulroxx/sympy,Titan-C/sympy,beni55/sympy,mcdaniel67/sympy,hrashk/sympy,cccfran/sympy,yashsharan/sympy,abhiii5459/sympy,Davidjohnwilson/sympy,postvakje/sympy