PEP8 corrections and added tests for qdef
PEP8 corrections and added tests for qdef

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