pub fn close_l1<A, S1, S2, D>( test: &ArrayBase<S1, D>, truth: &ArrayBase<S2, D>, rtol: A::Real, )where A: Scalar + Lapack, S1: Data<Elem = A>, S2: Data<Elem = A>, D: Dimension, D::Pattern: PartialEq + Debug,
check two arrays are close in L1 norm