src/Tools/ROOT

--- a/src/Tools/ROOT	Sat Oct 12 22:20:39 2019 +0200
+++ b/src/Tools/ROOT	Sun Oct 13 16:26:31 2019 +0200
@@ -1,5 +1,9 @@
 chapter Tools
 
+session Tools = Pure +
+  theories
+    Code_Generator
+
 session Spec_Check in Spec_Check = Pure +
   theories
     Spec_Check