message: use u128::MAX symbolic name
diff: @@ -6,5 +6,5 @@ extern "rust-intrinsic" {
  }
  fn main() {
  - unsafe { float_to_int_unchecked::<f64, u128>(340282366920938463463374607431768211455.0f64); } //~ ERROR: cannot be represented in target type `u128`
  + unsafe { float_to_int_unchecked::<f64, u128>(u128::MAX as f64); } //~ ERROR: cannot be represented in target type `u128`
  }
  