Added test for piecewise w/o assign_to
Added test for piecewise w/o assign_to

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