fixed #11779 the latex printer for the Singularity function
fixed #11779 the latex printer for the Singularity function

chaffra/sympy,jaimahajan1997/sympy,chaffra/sympy,madan96/sympy,skidzo/sympy,kaushik94/sympy,jaimahajan1997/sympy,skidzo/sympy,madan96/sympy,chaffra/sympy,madan96/sympy,kaushik94/sympy,jaimahajan1997/sympy,skidzo/sympy,yashsharan/sympy,yashsharan/sympy,kaushik94/sympy,yashsharan/sympy