It is not all that difficult to modify the document with general purpose tools like a text editor.

用象文本编辑器之类的通用工具来修改文档并不那么困难。

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For the purpose of this exercise, assume that you can't find out by reading the source code the type of component used as the text area in the HTML editor.

出于本练习的需要，假定您不能通过阅读源码查明在HTML编辑器中用作文本区域的组件的类型。

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