bin/use2to3 now makes converted files end in exactly one newline
bin/use2to3 now makes converted files end in exactly one newline

The code quality tester checks for this, and sometimes 2to3 adds extra
newlines, so this keeps the tests passing in Python 3.

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