Adding docstrings and doctests
Adding docstrings and doctests

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