Disable html escaping

This commit removes the automatic escaping of html characters,
effectively rendering JSON strings in the same way as is the
builtin Go encoder with SetEscapeHTML(false).
This should not affect the quality of the resulting JSON and
hopefully will not cause any downstream issues.

gjson.go

@@ -1940,9 +1940,6 @@ func AppendJSONString(dst []byte, s string) []byte {
 				dst = append(dst, 'u')
 				dst = appendHex16(dst, uint16(s[i]))
 			}
-		} else if s[i] == '>' || s[i] == '<' || s[i] == '&' {
-			dst = append(dst, '\\', 'u')
-			dst = appendHex16(dst, uint16(s[i]))
 		} else if s[i] == '\\' {
 			dst = append(dst, '\\', '\\')
 		} else if s[i] == '"' {

gjson_test.go

@@ -2549,9 +2549,17 @@ func TestGroup(t *testing.T) {
 	assert(t, res == `["123"]`)
 }
 
+func goJSONMarshal(i interface{}) ([]byte, error) {
+	buffer := &bytes.Buffer{}
+	encoder := json.NewEncoder(buffer)
+	encoder.SetEscapeHTML(false)
+	err := encoder.Encode(i)
+	return bytes.TrimRight(buffer.Bytes(), "\n"), err
+}
+
 func testJSONString(t *testing.T, str string) {
 	gjsonString := string(AppendJSONString(nil, str))
-	data, err := json.Marshal(str)
+	data, err := goJSONMarshal(str)
 	if err != nil {
 		panic(123)
 	}
@@ -2579,7 +2587,7 @@ func TestJSONString(t *testing.T) {
 	testJSONString(t, "R\xfd\xfc\a!\x82eO\x16?_\x0f\x9ab\x1dr")
 	testJSONString(t, "_\xb9\v\xad\xb3|X!\xb6\xd9U&\xa4\x1a\x95\x04")
 	data, _ := json.Marshal("\b\f")
-	if (string(data) == "\"\\b\\f\"") {
+	if string(data) == "\"\\b\\f\"" {
 		// Go version 1.22+ encodes "\b" and "\f" correctly.
 		testJSONString(t, "\b\f")
 		rng := rand.New(rand.NewSource(time.Now().UnixNano()))