Function display 

pub fn display(value: &Value) -> String

Coerces one value to its display form.

This is the form used by bare-word arguments, double-quoted interpolation, and emitted output:

• strings are reproduced verbatim, without quotes,
• numbers use their JSON literal,
• booleans become true or false,
• null becomes the empty string,
• arrays and objects become compact JSON text.