CONTRIBUTORS

--- a/CONTRIBUTORS	Sun Mar 15 11:57:59 2020 +0100
+++ b/CONTRIBUTORS	Sun Mar 15 13:20:22 2020 +0100
@@ -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 Isabelle2020
 -----------------------------