Added docstring to product()
Added docstring to product()

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