Fix expand() doctests
Fix expand() doctests

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