json decode：What exactly is the meaning of "token fusion between input and output"?

[CSEEduanyu]

@hnyls2002 When I used it, I found that there was an error here, and there was the word "todo" in the code. Does this mean that it is currently unavailable?

[CSEEduanyu]

And the end of my prompt is not a space, but a \n line break symbol.try to avoid this by removing the space at the end of the input.