physics/secondquant: Explicitly declare fac in key
physics/secondquant: Explicitly declare fac in key

In Python 2, variables "leak" after list comprehensions; this has been
removed in Python 3. Explicitly declare 'fac' as the last element of
'dumstruct' to fix this.

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