Doctest for FermionState + fixes
Doctest for FermionState + fixes

Renamed:
FermionState.only_below_fermi  ->  FermionState._only_below_fermi
FermionState.only_above_fermi  ->  FermionState._only_above_fermi

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