src/LCF/ROOT
changeset 69319 baccaf89ca0d
parent 69272 15e9ed5b28fb
child 70675 efd995488228
--- a/src/LCF/ROOT	Tue Nov 20 13:44:06 2018 +0100
+++ b/src/LCF/ROOT	Tue Nov 20 13:46:13 2018 +0100
@@ -1,7 +1,7 @@
 chapter LCF
 
 session LCF = Pure +
-  description \<open>
+  description "
     Author:     Tobias Nipkow
     Copyright   1992  University of Cambridge
 
@@ -9,12 +9,11 @@
 
     Useful references on LCF: Lawrence C. Paulson,
     Logic and Computation: Interactive proof with Cambridge LCF (CUP, 1987)
-\<close>
+  "
   sessions
     FOL
   theories
     LCF
-
     (* Some examples from Lawrence Paulson's book Logic and Computation *)
     "ex/Ex1"
     "ex/Ex2"