message: use `wrapping_*` instead of `overflowing_*`
  this is because we don't need to care about the overflowing
diff: @@ -59,7 +59,7 @@ impl BasicRandom {
  fn new(initial_state: u32) -> Self { BasicRandom { state: initial_state } }
  fn next(&mut self) -> u32 {
  - self.state = self.state.overflowing_mul(1103515245).0.overflowing_add(12345).0;
  + self.state = self.state.wrapping_mul(1103515245).wrapping_add(12345);
  return self.state;
  }
  }
  