Function: msgetweight
Section: modular_symbols
C-Name: msgetweight
Prototype: lG
Help: msgetweight(M): M being a full modular symbol space, as given by msinit, return its weight k.
Doc: $M$ being a full modular symbol space, as given by \kbd{msinit}, return
 its weight $k$.
 \bprog
 ? M = msinit(11,4);
 ? msgetweight(M)
 %2 = 4
 @eprog
