Fix errors and typos in the docstring of chi-squared
Fix errors and typos in the docstring of chi-squared

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