Fix docstring formatting, added "Returns" section
Fix docstring formatting, added "Returns" section

Now it should follow SymPy's conventions. Also it should make clear that the
function returns numerical values (not symbolic).

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