Test in test_str robustified to work on all platforms
Test in test_str robustified to work on all platforms

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