Formating configuration.

indent is the number of spaces in an indent.

columns is the desired column width of the formatted string. The formatter will try to fit it as best as possible to the column width, but can still exceed this limit. The maximum column width of the formatted string is unbounded.

Formats a JSON string. passes the string through Json.Decode.decodeString and bubbles up any JSON parsing errors.

Formats a Json.Encode.Value. Internally passes the string through Json.Decode.decodeValue and bubbles up any JSON parsing errors.