Fix Matrix.has doctest
Fix Matrix.has doctest

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