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Update regex.md

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w-halo
2016-04-08 17:41:12 +08:00
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@@ -23,7 +23,7 @@ var regex = /xyz/i;
但是，ES5不允许此时使用第二个参数，添加修饰符，否则会报错。
```javascript
var regex = new RegExp(/xyz/, i);
var regex = new RegExp(/xyz/, 'i');
// Uncaught TypeError: Cannot supply flags when constructing one RegExp from another
```