--- a/src/Pure/General/json.scala Sun Mar 11 15:05:43 2018 +0100
+++ b/src/Pure/General/json.scala Sun Mar 11 15:06:48 2018 +0100
@@ -1,7 +1,7 @@
/* Title: Pure/General/json.scala
Author: Makarius
-Support for JSON.
+Support for JSON: https://www.json.org/.
*/
package isabelle