Fix string printing

npm/index.js

@@ -518,7 +518,7 @@ function stringify(value, isPretty = false) {
 
   function stringifyValue(value, level = 0) {
     if (typeof value === 'string') {
-      return `${colors.string}"${value}"${colors.reset}`
+      return `${colors.string}${JSON.stringify(value)}${colors.reset}`
     } else if (typeof value === 'number') {
       return `${colors.number}${value}${colors.reset}`
     } else if (typeof value === 'bigint') {

npm/test.js

@@ -23,6 +23,11 @@ void async function main() {
     t.deepEqual(stdout, '[\n  {\n    "greeting": "hello world"\n  }\n]\n')
   })
 
+  await test('format - escape newline', async t => {
+    const {stdout} = await run('{"foo": "bar\nbaz"}')
+    t.equal(stdout, '{\n  "foo": "bar\\nbaz"\n}\n')
+  })
+
   await test('parseJson - valid json', async t => {
     const obj = {a: 2.3e100, b: 'str', c: null, d: false, e: [1, 2, 3]}
     const {stdout, stderr} = await run(obj)