Class checking: "instanceof" misleading sentence and example.

Great tutorial, thanks so much!
Since the comment section was removed, just wanted to add here a correction. In the parragraph: "It also works with constructor functions:" the example below is not a constructor function. What you are using is precisely an instance of Rabbit, but in the form of "new Rabbit()". It could be misleading to say that the instanceof operator works with constructor functions.

找到包含句子“It also works with constructor functions:”及其 `new Rabbit()` 示例的教程部分。阅读 `instanceof` 附近的说明，然后纠正具有误导性的措辞以及示例中的区别；完成标准是该段准确描述 `instanceof` 的操作对象。

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