log._eval_nseries() refactored.
log._eval_nseries() refactored.

Signed-off-by: Kirill Smelkov <b0eeaac46e675e9f95bf68c0df1041cf581c26f4@landau.phys.spbu.ru>

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