Fix the docstring of Expr.series so that it renders better in Sphinx
Fix the docstring of Expr.series so that it renders better in Sphinx

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