清单22对最初由Sam Ruby提供的代码进行了修改，包含Atom文本结构或内容元素的JSON序列化，并将其转换为一个字符串。

Listing 22 is a modified version of code originally provided by Sam Ruby that takes the JSON serialization of an Atom text construct or content element and converts it back into a string.

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此警告意味着将常数字符串用作可能修改该字符串内容的函数的参数。

This warning indicates the use of a constant string as an argument to a function that might modify the contents of that string.

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