diff -r 7f5a4cd08209 -r 608483c2122a src/HOL/MiniML/I.thy
--- a/src/HOL/MiniML/I.thy	Mon Feb 05 21:27:16 1996 +0100
+++ b/src/HOL/MiniML/I.thy	Mon Feb 05 21:29:06 1996 +0100
@@ -8,16 +8,16 @@
 I = W +
 
 consts
-	I :: [expr, typ list, nat, subst] => result_W
+        I :: [expr, typ list, nat, subst] => result_W
 
 primrec I expr
-        I_Var	"I (Var i) a n s = (if i < length a then Ok(s, nth i a, n)
+        I_Var   "I (Var i) a n s = (if i < length a then Ok(s, nth i a, n)
                                     else Fail)"
-        I_Abs	"I (Abs e) a n s = ( (s,t,m) := I e ((TVar n)#a) (Suc n) s;
+        I_Abs   "I (Abs e) a n s = ( (s,t,m) := I e ((TVar n)#a) (Suc n) s;
                                      Ok(s, TVar n -> t, m) )"
-        I_App	"I (App e1 e2) a n s =
- 		   ( (s1,t1,m1) := I e1 a n s;
-		     (s2,t2,m2) := I e2 a m1 s1;
-		     u := mgu ($s2 t1) ($s2 t2 -> TVar m2);
-		     Ok($u o s2, TVar m2, Suc m2) )"
+        I_App   "I (App e1 e2) a n s =
+                   ( (s1,t1,m1) := I e1 a n s;
+                     (s2,t2,m2) := I e2 a m1 s1;
+                     u := mgu ($s2 t1) ($s2 t2 -> TVar m2);
+                     Ok($u o s2, TVar m2, Suc m2) )"
 end