Add String to goprintasstring

scripts/goprintasjson

@@ -6,18 +6,21 @@ echo "
 
 // ---------------------------- PrintAsJSON ---------------------------
 
-func (s $name) MarshalJSON() ([]byte, error) {
+func (s *$name) MarshalJSON() ([]byte, error) {
     buf := ""
     // TODO
     return []byte(buf),nil
 }
 
 // JSON implements PrintAsJSON multi-line, 2-space indent JSON output.
-func (s $name) JSON() string {b,_ :=s.MarshalJSON();return string(b)}
-func (s $name) JSON() string {b,_ :=json.Marshal(s);return string(b)}
+func (s *$name) JSON() string {b,_ :=s.MarshalJSON();return string(b)}
+func (s *$name) JSON() string {b,_ :=json.Marshal(s);return string(b)}
+
+// String implements PrintAsJSON and fmt.Stringer interface as JSON.
+func (s $name) String() string {return s.JSON()}
 
 // Print implements PrintAsJSON.
-func (s $name) Print() { fmt.Println(s.JSON()) }
+func (s *$name) Print() { fmt.Println(s.JSON()) }
 
 // Log implements PrintAsJSON.
 func (s $name) Log() { log.Print(s.JSON()) }