Massive cleanup to vector pretty printing.
Massive cleanup to vector pretty printing.

I didn't know how to use super when I originally wrote this printer,
apparently. Using that makes it way, way cleaner. Also, the new approach is a
little "simpler", but it should be fine in practice.

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