anchor.diff:    TestResult run() {
       return runCommand(cmd, env);
     }
  +
  +  void printReproductionCommand() => print(cmd.join(" "));
   
     String description;
     String dart;
  
positive.code:       return result;
      }
      return runCommand([dart, snapshot], env);
    }
  
    String description;
  
negative.code:       return result;
      }
      return runCommand(['nodejs', js], env);
    }
  
    void printReproductionCommand() {
      print([dart2js, fileName, '-o', js].join(" "));
      print(['nodejs', js].join(" "));
    }
  
    String description;
  