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()` 範例的教學章節。閱讀 `instanceof` 周圍的說明，然後修正具有誤導性的措辭以及範例中的區別；完成標準是該段準確描述 `instanceof` 的操作對象。

由索引模型根據 Issue 內容生成。