diff -r dd58f13a8eb4 -r eb85850d3eb7 src/HOL/Lambda/ListBeta.thy
--- a/src/HOL/Lambda/ListBeta.thy	Fri Nov 17 02:19:55 2006 +0100
+++ b/src/HOL/Lambda/ListBeta.thy	Fri Nov 17 02:20:03 2006 +0100
@@ -13,7 +13,7 @@
 *}
 
 abbreviation
-  list_beta :: "dB list => dB list => bool"   (infixl "=>" 50)
+  list_beta :: "dB list => dB list => bool"  (infixl "=>" 50) where
   "rs => ss == (rs, ss) : step1 beta"
 
 lemma head_Var_reduction: