--- a/src/HOL/ex/Guess.thy Sun Nov 02 18:21:14 2014 +0100 +++ b/src/HOL/ex/Guess.thy Sun Nov 02 18:21:45 2014 +0100 @@ -2,7 +2,7 @@ Author: Makarius *) -header {* Proof by guessing *} +section {* Proof by guessing *} theory Guess imports Main