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book: fix the incorrect character in regex (#107)

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TinyWang
2020-07-17 22:36:48 +08:00
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book/en-us/06-regex.md
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@@ -48,7 +48,7 @@ and is also the core matching syntax of a regular expression. See the table belo
| `\`| Marks the next character as either a special character, or a literal character, or a backward reference, or an octal escape character. For example, `n` Matches the character `n`. `\n` matches newline characters. The sequence `\\` Matches the `'\'` character, while `\(` matches the `'('` character.|
|`^`| Matches the beginning of the input string, unless it is used in a square bracket expression, at which point it indicates that the set of characters is not accepted. |
|`{`| Marks the beginning of a qualifier expression. |
|`\`| Indicates a choice between the two. |
|`\|`| Indicates a choice between the two. |
### Quantifiers