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go - 文本/扫描仪与 IsIdentRune 一起挂起

如果我有这个代码：

该程序将打印这两行，但它只是永远挂起。我在文档中看到了这一点：

有效字符集不得与空白字符集相交。

但似乎我正在遵循给定的方向。我究竟做错了什么？

  1. https://godocs.io/text/scanner#Scanner.IsIdentRune

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