--- a/src/HOL/Option.ML Thu Sep 26 11:11:22 1996 +0200
+++ b/src/HOL/Option.ML Thu Sep 26 12:47:47 1996 +0200
@@ -27,5 +27,5 @@
by (option.induct_tac "opt" 1);
by (Simp_tac 1);
by (Asm_full_simp_tac 1);
-by(Fast_tac 1);
+by (Fast_tac 1);
qed"expand_option_case";