Some more docs for polygamma functions
Some more docs for polygamma functions

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