old_contents: /*
   * Copyright (c) 2012 Mathieu Turcotte
   * Licensed under the MIT license.
   */
  
  var precond = require('../index');
  
  function main(a, b) {
      precond.checkArgument(a > b, 'a (%s) should be greatre than b (%s)', a, b);
  }
  
  try {
      main(10, 20);
  } catch(err) {
      console.log(err.stack);
  }
  
new_contents: /*
   * Copyright (c) 2012 Mathieu Turcotte
   * Licensed under the MIT license.
   */
  
  var precond = require('../index');
  
  function main(a, b) {
      precond.checkArgument(a > b, 'a (%s) should be greater than b (%s)', a, b);
  }
  
  try {
      main(10, 20);
  } catch(err) {
      console.log(err.stack);
  }
  
subject: Fix typo.