Fix: Correction, removed the content = string equalization

[andrey67895]

There are situations when the built-in print() function is needed - it is convenient. But due to the presence of a content change to string inside it, format-sensitive data may break. For example, the method can receive as String (in case of an error) so is File, but if there is a file, converting the original content to String led to an error when debagging.

[johanhaleby]

If I remember it correctly, content is used for caching purposes, if you try to read the response again. This will be quite a large breaking change if I bring it in. And I don't see any tests.