Function: matpascal
Section: linear_algebra
C-Name: matqpascal
Prototype: LDG
Help: matpascal(n,{q}): Pascal triangle of order n if q is omitted. q-Pascal
 triangle otherwise.
Doc: creates as a matrix the lower triangular
 \idx{Pascal triangle} of order $x+1$ (i.e.~with binomial coefficients
 up to $x$). If $q$ is given, compute the $q$-Pascal triangle (i.e.~using
 $q$-binomial coefficients).

Variant: Also available is \fun{GEN}{matpascal}{GEN x}.
