Matrix: fix doctests
Matrix: fix doctests

Now we've changed how Matrix prints itself, its time to fix related doctests.

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