Better names for the preimplemented Manifolds R2 and R3.
Better names for the preimplemented Manifolds R2 and R3.

The new names for the coordinate systems print better.

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