message: actually compute the norm
diff: @@ -132,7 +132,7 @@ where
  self.p = self.r.scale(-1.0).scaled_add(self.beta, p);
  let norm = self.r.dot(self.r.clone());
  - let mut out = ArgminIterationData::new(new_param, norm);
  + let mut out = ArgminIterationData::new(new_param, norm.sqrt());
  out.add_kv(make_kv!(
  "alpha" => self.alpha;
  "beta" => self.beta;
  