Fix spelling mistakes etc on the doc index page
Fix spelling mistakes etc on the doc index page

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