--- a/src/HOL/ex/StringEx.thy Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/ex/StringEx.thy Fri Jun 17 16:12:49 2005 +0200
@@ -1,7 +1,7 @@
header {* String examples *}
-theory StringEx = Main:
+theory StringEx imports Main begin
lemma "hd ''ABCD'' = CHR ''A''"
by simp