src/HOL/Lex/Prefix.ML
changeset 4423 a129b817b58a
parent 4089 96fba19bcbe2
child 4643 1b40fcac5a09
--- a/src/HOL/Lex/Prefix.ML	Tue Dec 16 15:17:26 1997 +0100
+++ b/src/HOL/Lex/Prefix.ML	Tue Dec 16 17:58:03 1997 +0100
@@ -35,7 +35,7 @@
 qed "prefix_Cons";
 
 goalw Prefix.thy [prefix_def] "(x#xs <= y#ys) = (x=y & xs<=ys)";
-by(Simp_tac 1);
+by (Simp_tac 1);
 by (Fast_tac 1);
 qed"Cons_prefix_Cons";
 Addsimps [Cons_prefix_Cons];