Update whitespace output example #15
                
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Hello, please check out this PR
I encountered an open source called echo-jwt while browsing several open sources to process jwt-related logic, and while referencing the document, there was a space in the first line of the output example.
However, I'm not sure if it was intentionally spaced, accidentally spaced, or accidentally spaced. If it's a mistake, please merge this PR!
Thank you :)