commented a test case that trigger factor_list() bug
commented a test case that trigger factor_list() bug

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