old_contents: Object.defineProperty(Number, 'EPSILON', {
  	enumerable: false,
  	configurable: false,
  	writable: false,
  	value: Math.pow(2, -52)
  });
  
new_contents: // 20.1.2.1. Number.EPSILON
  // The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1 that is representable as a Number value, which is approximately 2.2204460492503130808472633361816 x 10-16.
  // This property has the attributes { [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: false }.
  Object.defineProperty(Number, 'EPSILON', {
  	enumerable: false,
  	configurable: false,
  	writable: false,
  	value: Math.pow(2, -52)
  });
  
subject: Add spec comment to Number.EPSILON (#1551)