pub fn assert_eq_within<'a, T>(
    value_1: &'a T,
    value_2: &'a T,
    tol_abs: &TensorRank0,
    tol_rel: &TensorRank0,
) -> Result<(), TestError>pub fn assert_eq_within<'a, T>(
    value_1: &'a T,
    value_2: &'a T,
    tol_abs: &TensorRank0,
    tol_rel: &TensorRank0,
) -> Result<(), TestError>