diff -r 37a92211a5d3 -r dbb95b825244 src/HOL/PreList.thy
--- a/src/HOL/PreList.thy	Fri Apr 16 04:06:52 2004 +0200
+++ b/src/HOL/PreList.thy	Fri Apr 16 04:07:10 2004 +0200
@@ -6,13 +6,14 @@
 
 header{*A Basis for Building the Theory of Lists*}
 
-(*Is defined separately to serve as a basis for theory ToyList in the
-documentation.*)
-
 theory PreList =
     Wellfounded_Relations + Presburger + Recdef + Relation_Power + Parity:
 
-(*belongs to theory Wellfounded_Recursion*)
+text {*
+  Is defined separately to serve as a basis for theory ToyList in the
+  documentation. *}
+
 lemmas wf_induct_rule = wf_induct [rule_format, case_names less, induct set: wf]
+  -- {* belongs to theory @{text Wellfounded_Recursion} *}
 
 end