message: minor update example
diff: @@ -30,10 +30,10 @@ fn run() -> Result<(), Box<std::error::Error>> {
  let init_param: Vec<f64> = vec![1.5, 1.5];
  // let result = solver.run(&prob, &prob.random_param()?)?;
  - let result = solver.run(&prob, &init_param)?;
  + let result1 = solver.run(&prob, &init_param)?;
  // print result
  - println!("{:?}", result);
  + println!("{:?}", result1);
  let mut solver = GradientDescent::new();
  solver.max_iters(10_000);
  @@ -44,10 +44,10 @@ fn run() -> Result<(), Box<std::error::Error>> {
  solver.gamma_update(GDGammaUpdate::BacktrackingLineSearch(linesearch));
  // let result = solver.run(&prob, &prob.random_param()?)?;
  - let result = solver.run(&prob, &init_param)?;
  + let result2 = solver.run(&prob, &init_param)?;
  // print result
  - println!("{:?}", result);
  + println!("{:?}", result2);
  // Manually solve it
  let mut solver = GradientDescent::new();
  @@ -55,8 +55,8 @@ fn run() -> Result<(), Box<std::error::Error>> {
  loop {
  let par = solver.next_iter();
  - // println!("{:?}", par);
  - if par.1 >= result.iters {
  + println!("{:?}", par);
  + if par.1 >= result1.iters {
  break;
  };
  }
  