   Object: [
     o "{ AssignList }",                         -> new ObjectNode $2
     o "{ IndentedAssignList }",                 -> new ObjectNode $2
+    o "{ AssignList , }",                       -> new ObjectNode $2
+    o "{ IndentedAssignList , }",               -> new ObjectNode $2
   ]
 
   # Class definitions have optional bodies of prototype property assignments,

  # The array literal.
  Array: [
    o "[ ArgList ]",                            -> new ArrayNode $2
  ]

  # The **ArgList** is both the list of objects passed into a function call,

  # The list of arguments to a function call.
  Arguments: [
    o "CALL_START ArgList CALL_END",            -> $2
    o "CALL_START ArgList , CALL_END",          -> $2
  ]

  # Calling super.
  Super: [
    o "SUPER CALL_START ArgList CALL_END",      -> new CallNode 'super', $3
    o "SUPER CALL_START ArgList , CALL_END",    -> new CallNode 'super', $3
  ]

  # A reference to the *this* current object, either naked or to a property.
