Pretty-print JSON in examples

[vladislav-sharapov]

I am not quite sure that this is an issue, so I decided to start a new discussion. There are 2 examples of how you can create JSON using jo on page dedicated to JSON. In both examples jo is used to send output to curl. Why add -p option to pretty-print JSON if output goes to curl?

[jay]

Thanks. It was probably done out of habit. See #460