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remove an unexpected space
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@ -110,7 +110,7 @@ abc[^0-9]
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# 五、重复匹配
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- **\+** 匹配 1 个或者多个字符
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- **\** * 匹配 0 个或者多个
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- **\*** 匹配 0 个或者多个
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- **?** 匹配 0 个或者 1 个
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**应用**
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