Run doctests in Travis CI as well
Run doctests in Travis CI as well

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