modification to the docstrings of multinomial_coefficients and multinomial_coefficients_iterator merged from smichr branch
modification to the docstrings of multinomial_coefficients and
multinomial_coefficients_iterator merged from smichr branch

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