bessel.py: docstring cleanup
bessel.py: docstring cleanup

Signed-off-by: Thomas Hisch <85fee2da1192d9b192c36704e88f9f01ec3bfb50@tuwien.ac.at>

kaushik94/sympy,mafiya69/sympy,rahuldan/sympy,mcdaniel67/sympy,ahhda/sympy,madan96/sympy,drufat/sympy,jaimahajan1997/sympy,skidzo/sympy,lindsayad/sympy,postvakje/sympy,ChristinaZografou/sympy,chaffra/sympy,Shaswat27/sympy,chaffra/sympy,kaushik94/sympy,mafiya69/sympy,jerli/sympy,Curious72/sympy,postvakje/sympy,Shaswat27/sympy,sampadsaha5/sympy,Curious72/sympy,kaichogami/sympy,Arafatk/sympy,kaichogami/sympy,Davidjohnwilson/sympy,ChristinaZografou/sympy,skidzo/sympy,madan96/sympy,Arafatk/sympy,rahuldan/sympy,aktech/sympy,drufat/sympy,rahuldan/sympy,hargup/sympy,ChristinaZografou/sympy,ga7g08/sympy,Davidjohnwilson/sympy,oliverlee/sympy,postvakje/sympy,yashsharan/sympy,jerli/sympy,ga7g08/sympy,mafiya69/sympy,kaushik94/sympy,Titan-C/sympy,ahhda/sympy,ahhda/sympy,souravsingh/sympy,sampadsaha5/sympy,mcdaniel67/sympy,Shaswat27/sympy,hargup/sympy,yashsharan/sympy,drufat/sympy,Arafatk/sympy,hargup/sympy,Titan-C/sympy,jerli/sympy,lindsayad/sympy,Curious72/sympy,aktech/sympy,kaichogami/sympy,oliverlee/sympy,oliverlee/sympy,jaimahajan1997/sympy,Titan-C/sympy,ga7g08/sympy,madan96/sympy,skidzo/sympy,chaffra/sympy,aktech/sympy,Davidjohnwilson/sympy,jaimahajan1997/sympy,souravsingh/sympy,yashsharan/sympy,souravsingh/sympy,sampadsaha5/sympy,lindsayad/sympy,mcdaniel67/sympy