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书写错误

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用全局搜索又发现了两个BigInt书写错误
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@ -565,7 +565,7 @@ typeof 123n // 'bigint'
### BigInt 对象
JavaScript 原生提供`BigInt`对象，可以用作构造函数生成 BitInt 类型的数值。转换规则基本与`Number()`一致，将别的类型的值转为 BigInt。
JavaScript 原生提供`BigInt`对象，可以用作构造函数生成 BigInt 类型的数值。转换规则基本与`Number()`一致，将别的类型的值转为 BigInt。
```javascript
BigInt(123) // 123n
@ -577,7 +577,7 @@ BigInt(true) // 1n
`BigInt`构造函数必须有参数，而且参数必须可以正常转为数值，下面的用法都会报错。
```javascript
new BitInt() // TypeError
new BigInt() // TypeError
BigInt(undefined) //TypeError
BigInt(null) // TypeError
BigInt('123n') // SyntaxError