     else
       @l(n)+unreserve n
 
-  # `id_param`  
+  # `id_param`
   # Function parameters. Belongs to `list`.
 
   'id_param': (n) ->

    c.toString()


  # `property_identifier`  
  # A key in an object literal.

  'property_identifier': (n) ->

  'block': (args...) ->
    @script.apply @, args

  # `unsupported()`
  # Throws an unsupported error.
  'unsupported': (node, message) ->
    throw new UnsupportedError("Unsupported: #{message}", node)
