anchor.diff:      }
     }
   
  -  static testMain() {
  +  static runOne() {
       var a = 22;
       var b = 4;
       // Smi & smi.
  
positive.code:     Expect.equals(false, (3).hashCode() == (1).hashCode());
      Expect.equals(true, (10).hashCode() == (10).hashCode());
    }
  }
  
  main() {
  
negative.code:     Expect.equals(2.0, 10 / 5);
      Expect.equals(2, a % b);
      Expect.equals(2, a.remainder(b));
      // Smi corner cases.
      for (int i = 0; i < 80; i++) {
        a = -(1 << i);
        b = -1;
        Expect.equals(1 << i, a ~/ b);
      }
      a = 22;
      b = 4.0;
      // Smi & double.
  