Changed the toString of Iterator to have the word "iterator" in it

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@14051 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

src/library/scala/Iterator.scala

@@ -673,5 +673,5 @@ trait Iterator[+A] {
     }
     buf.append(end)
   }
-  override def toString = if (hasNext) "has" else "empty"
+  override def toString = (if (hasNext) "non-empty" else "empty")+" iterator"
 }