gistfile1.txt

JSON 1: {"foo":"bar","foo2":"bar2","foo3":"bar3"}
JSON 2: {"foo":"bar","foo2":"bar2","foo3":"bar3"}
JSON 3: { "foo": "bar", "foo2": "bar2", "foo3": "bar3" }
JSON 4: {"foo":"bar","foo2":"bar2","foo3":"bar3"}
JSON 4: {
  "foo":"bar",
  "foo2":"bar2",
  "foo3":"bar3"
}
JSON 5: {
   "foo": "bar",
   "foo2": "bar2",
   "foo3": "bar3"
 }

test.sf

import io;
import json;

// h = hash[[ "foo" : "bar" ]];
h = "{ \"foo\": \"bar\", \"foo2\": \"bar2\", \"foo3\": \"bar3\" }";
s = json.encode(h);

io.println("JSON 1: ", s);

io.println("JSON 2: ", json.encode(h));
io.println("JSON 3: ", json.encode(h, json.SPACED));
io.println("JSON 4: ", json.encode(h, json.PLAIN));
io.println("JSON 4: ", json.encode(h, json.PRETTY));
io.println("JSON 5: ", json.encode(h, json.PRETTY + json.SPACED));