Plain text pretty printing of containers.
Plain text pretty printing of containers.

Don't change the plaintext printing of containers unless they
contain only SymPy types.

Fixes issue 3513.

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