CONTRIBUTORS

--- a/CONTRIBUTORS	Fri Sep 08 19:55:18 2017 +0200
+++ b/CONTRIBUTORS	Fri Sep 08 19:37:46 2017 +0200
@@ -3,6 +3,10 @@
 listed as an author in one of the source files of this Isabelle distribution.
 
 
+Contributions to this Isabelle version
+--------------------------------------
+
+
 Contributions to Isabelle2017
 -----------------------------