--- a/src/HOL/Predicate_Compile_Examples/Reg_Exp_Example.thy Mon Dec 09 12:16:52 2013 +0100
+++ b/src/HOL/Predicate_Compile_Examples/Reg_Exp_Example.thy Mon Dec 09 12:22:23 2013 +0100
@@ -4,7 +4,7 @@
"~~/src/HOL/Library/Code_Prolog"
begin
-text {* An example from the experiments from SmallCheck (http://www.cs.york.ac.uk/fp/smallcheck/) *}
+text {* An example from the experiments from SmallCheck (@{url "http://www.cs.york.ac.uk/fp/smallcheck/"}) *}
text {* The example (original in Haskell) was imported with Haskabelle and
manually slightly adapted.
*}