若要确定某个文件或某一组文本文件是否有嵌入的控制字符，可以使用这些选项。
To determine whether a file or a group of text files has embedded control characters, use these options. For instance, if a file has trailing blanks, you can see them
指示指定字符串中位于指定位置处的字符是否属于控制字符类别。
Indicates whether the character at the specified position in a specified string is categorized as a control character.
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