move and improve solve docstring and sort symbols passed as a set
move and improve solve docstring and sort symbols passed as a set

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