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Oct 9, 2020
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Remove redundant \ #604

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6 changes: 3 additions & 3 deletions docs/book/18-Strings.md
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Expand Up @@ -801,10 +801,10 @@ the mightiest banana in the forest...with... a banana!
| 表达式 | 含义 |
| :---- | :---- |
| `.` | 任意字符 |
| `[abc]` |包含`a`、`b`或`c`的任何字符（和`a\|b\|c`作用相同）|
| `[abc]` |包含`a`、`b`或`c`的任何字符（和`a|b|c`作用相同）|
| `[^abc]` | 除`a`、`b`和`c`之外的任何字符（否定） |
| `[a-zA-Z]` | 从`a`到`z`或从`A`到`Z`的任何字符（范围） |
| `[abc[hij]]` | `a`、`b`、`c`、`h`、`i`、`j`中的任意字符（与`a\|b\|c\|h\|i\|j`作用相同）（合并） |
| `[abc[hij]]` | `a`、`b`、`c`、`h`、`i`、`j`中的任意字符（与`a|b|c|h|i|j`作用相同）（合并） |
| `[a-z&&[hij]]` | 任意`h`、`i`或`j`（交） |
| `\s` | 空白符（空格、tab、换行、换页、回车） |
| `\S` | 非空白符（`[^\s]`） |
Expand All @@ -818,7 +818,7 @@ the mightiest banana in the forest...with... a banana!
| 逻辑操作符 | 含义 |
| :----: | :---- |
| `XY` | `Y`跟在`X`后面 |
| `X\|Y` | `X`或`Y` |
| `X|Y` | `X`或`Y` |
| `(X)` | 捕获组（capturing group）。可以在表达式中用`\i`引用第i个捕获组 |

下面是不同的边界匹配符：
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