More documentation added to Add.flatten()
More documentation added to Add.flatten()

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