1.1 --- a/src/Pure/General/markup.scala	Mon Jan 04 18:55:32 2010 +0100
     1.2 +++ b/src/Pure/General/markup.scala	Mon Jan 04 18:56:36 2010 +0100
     1.3 @@ -153,6 +153,7 @@
     1.4  
     1.5    /* interactive documents */
     1.6  
     1.7 +  val ASSIGN = "assign"
     1.8    val EDIT = "edit"
     1.9  
    1.10