remove indexing of permutation; use array_form instead
remove indexing of permutation; use array_form instead

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