diff -r 5f3f203a38ad -r 74eddfef841e src/Pure/General/symbol.scala
--- a/src/Pure/General/symbol.scala	Mon Sep 14 16:44:09 2015 +0200
+++ b/src/Pure/General/symbol.scala	Mon Sep 14 17:39:29 2015 +0200
@@ -289,7 +289,7 @@
         props match {
           case Nil => Nil
           case _ :: Nil => err()
-          case Key(x) :: y :: rest => (x -> y) :: read_props(rest)
+          case Key(x) :: y :: rest => (x -> y.replace('\u2423', ' ')) :: read_props(rest)
           case _ => err()
         }
       }