Improve docstrings
Improve docstrings

maniteja123/sympy,rahuldan/sympy,drufat/sympy,ChristinaZografou/sympy,jerli/sympy,kaushik94/sympy,jaimahajan1997/sympy,Davidjohnwilson/sympy,skidzo/sympy,maniteja123/sympy,aktech/sympy,MechCoder/sympy,oliverlee/sympy,ahhda/sympy,lindsayad/sympy,yashsharan/sympy,Curious72/sympy,jerli/sympy,ga7g08/sympy,rahuldan/sympy,ga7g08/sympy,mcdaniel67/sympy,Curious72/sympy,madan96/sympy,oliverlee/sympy,mafiya69/sympy,aktech/sympy,ahhda/sympy,lindsayad/sympy,Shaswat27/sympy,yashsharan/sympy,mcdaniel67/sympy,Curious72/sympy,MechCoder/sympy,aktech/sympy,hargup/sympy,chaffra/sympy,lindsayad/sympy,wanglongqi/sympy,skidzo/sympy,wanglongqi/sympy,Arafatk/sympy,postvakje/sympy,souravsingh/sympy,Davidjohnwilson/sympy,jaimahajan1997/sympy,Davidjohnwilson/sympy,jaimahajan1997/sympy,souravsingh/sympy,Titan-C/sympy,hargup/sympy,kaushik94/sympy,Arafatk/sympy,kaichogami/sympy,mcdaniel67/sympy,kevalds51/sympy,postvakje/sympy,drufat/sympy,hargup/sympy,drufat/sympy,yashsharan/sympy,ChristinaZografou/sympy,wanglongqi/sympy,madan96/sympy,ahhda/sympy,postvakje/sympy,kevalds51/sympy,ga7g08/sympy,sampadsaha5/sympy,Titan-C/sympy,kaichogami/sympy,kaichogami/sympy,sampadsaha5/sympy,oliverlee/sympy,Titan-C/sympy,rahuldan/sympy,skidzo/sympy,Arafatk/sympy,madan96/sympy,mafiya69/sympy,kaushik94/sympy,sampadsaha5/sympy,MechCoder/sympy,souravsingh/sympy,mafiya69/sympy,Shaswat27/sympy,maniteja123/sympy,Shaswat27/sympy,kevalds51/sympy,jerli/sympy,ChristinaZografou/sympy,chaffra/sympy,chaffra/sympy