Fix and clean up documentation in wigner
Fix and clean up documentation in wigner

  - Fixes the mix-up of l vs j and Y vs Wigner3j in gaunt (#7551)
  - Wrap the ridiculously long equations
  - Format the function names using \operatorname

shikil/sympy,drufat/sympy,grevutiu-gabriel/sympy,hargup/sympy,mafiya69/sympy,saurabhjn76/sympy,aktech/sympy,chaffra/sympy,hargup/sympy,debugger22/sympy,iamutkarshtiwari/sympy,kaichogami/sympy,pandeyadarsh/sympy,jbbskinny/sympy,Shaswat27/sympy,Vishluck/sympy,AkademieOlympia/sympy,kaushik94/sympy,emon10005/sympy,postvakje/sympy,yashsharan/sympy,lindsayad/sympy,rahuldan/sympy,Vishluck/sympy,yashsharan/sympy,ChristinaZografou/sympy,Arafatk/sympy,AkademieOlympia/sympy,VaibhavAgarwalVA/sympy,Davidjohnwilson/sympy,kaushik94/sympy,jbbskinny/sympy,mcdaniel67/sympy,postvakje/sympy,Designist/sympy,kevalds51/sympy,ga7g08/sympy,jaimahajan1997/sympy,Shaswat27/sympy,farhaanbukhsh/sympy,Curious72/sympy,kaichogami/sympy,cswiercz/sympy,MechCoder/sympy,debugger22/sympy,jerli/sympy,drufat/sympy,kumarkrishna/sympy,ChristinaZografou/sympy,Titan-C/sympy,aktech/sympy,pandeyadarsh/sympy,oliverlee/sympy,saurabhjn76/sympy,Designist/sympy,farhaanbukhsh/sympy,pandeyadarsh/sympy,sampadsaha5/sympy,yukoba/sympy,Shaswat27/sympy,saurabhjn76/sympy,atreyv/sympy,VaibhavAgarwalVA/sympy,drufat/sympy,maniteja123/sympy,iamutkarshtiwari/sympy,yukoba/sympy,iamutkarshtiwari/sympy,mcdaniel67/sympy,Titan-C/sympy,emon10005/sympy,Curious72/sympy,souravsingh/sympy,Arafatk/sympy,mcdaniel67/sympy,maniteja123/sympy,yashsharan/sympy,skidzo/sympy,abhiii5459/sympy,mafiya69/sympy,kaushik94/sympy,jaimahajan1997/sympy,souravsingh/sympy,maniteja123/sympy,hargup/sympy,ga7g08/sympy,kumarkrishna/sympy,grevutiu-gabriel/sympy,cswiercz/sympy,kevalds51/sympy,emon10005/sympy,moble/sympy,debugger22/sympy,MechCoder/sympy,wanglongqi/sympy,mafiya69/sympy,AkademieOlympia/sympy,sampadsaha5/sympy,farhaanbukhsh/sympy,shikil/sympy,Vishluck/sympy,Curious72/sympy,jbbskinny/sympy,grevutiu-gabriel/sympy,kaichogami/sympy,rahuldan/sympy,moble/sympy,Titan-C/sympy,jerli/sympy,chaffra/sympy,wanglongqi/sympy,rahuldan/sympy,shikil/sympy,atreyv/sympy,yukoba/sympy,MechCoder/sympy,moble/sympy,lindsayad/sympy,sahmed95/sympy,Designist/sympy,ga7g08/sympy,wanglongqi/sympy,ahhda/sympy,Davidjohnwilson/sympy,chaffra/sympy,madan96/sympy,sahmed95/sympy,kevalds51/sympy,cswiercz/sympy,lindsayad/sympy,ahhda/sympy,abhiii5459/sympy,oliverlee/sympy,souravsingh/sympy,Davidjohnwilson/sympy,ahhda/sympy,kumarkrishna/sympy,skidzo/sympy,ChristinaZografou/sympy,aktech/sympy,atreyv/sympy,oliverlee/sympy,VaibhavAgarwalVA/sympy,postvakje/sympy,jerli/sympy,jaimahajan1997/sympy,sampadsaha5/sympy,abhiii5459/sympy,madan96/sympy,skidzo/sympy,sahmed95/sympy,madan96/sympy,Arafatk/sympy