Changes from Python 3.3 to Python 3.4

--- /home/docs/checkouts/readthedocs.org/user_builds/restrictedpython/checkouts/latest/docs/contributing/ast/python3_3.ast
+++ /home/docs/checkouts/readthedocs.org/user_builds/restrictedpython/checkouts/latest/docs/contributing/ast/python3_4.ast
@@ -1,7 +1,7 @@
--- PYTHON 3.3 AST
--- ASDL's five builtin types are identifier, int, string, bytes, object
+-- Python 3.4 AST
+-- ASDL's six builtin types are identifier, int, string, bytes, object, singleton
 
-module Python version "3.3"
+module Python version "3.4"
 {
     mod = Module(stmt* body)
         | Interactive(stmt* body)
@@ -78,8 +78,8 @@
          | Num(object n) -- a number as a PyObject.
          | Str(string s) -- need to specify raw, unicode, etc?
          | Bytes(bytes s)
+         | NameConstant(singleton value)
          | Ellipsis
-         -- other literals? bools?
 
          -- the following expression can appear in assignment context
          | Attribute(expr value, identifier attr, expr_context ctx)
@@ -141,14 +141,14 @@
                     attributes (int lineno, int col_offset)
 
     arguments = (arg* args,
-                 identifier? vararg,
-                 expr? varargannotation,
+                 arg? vararg,
                  arg* kwonlyargs,
-                 identifier? kwarg,
-                 expr? kwargannotation,
-                 expr* defaults,
-                 expr* kw_defaults)
+                 expr* kw_defaults,
+                 arg? kwarg,
+                 expr* defaults)
+
     arg = (identifier arg, expr? annotation)
+          attributes (int lineno, int col_offset)
 
     -- keyword arguments supplied to call
     keyword = (identifier arg, expr value)