use _eval_commutator_class instead of testing with isinstance(..., class). Added rule that makes Boson and Fermion operators commute.
use _eval_commutator_class instead of testing with isinstance(..., class). Added rule that makes Boson and Fermion operators commute.

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