added literal;

--- a/src/Pure/General/markup.ML	Sat Aug 09 00:09:39 2008 +0200
+++ b/src/Pure/General/markup.ML	Sat Aug 09 12:28:09 2008 +0200
@@ -51,6 +51,7 @@
   val numN: string val num: T
   val xnumN: string val xnum: T
   val xstrN: string val xstr: T
+  val literalN: string val literal: T
   val sortN: string val sort: T
   val typN: string val typ: T
   val termN: string val term: T
@@ -177,6 +178,7 @@
 val (numN, num) = markup_elem "num";
 val (xnumN, xnum) = markup_elem "xnum";
 val (xstrN, xstr) = markup_elem "xstr";
+val (literalN, literal) = markup_elem "literal";
 
 val (sortN, sort) = markup_elem "sort";
 val (typN, typ) = markup_elem "typ";