Changes from Python 3.2 to Python 3.3

--- /home/docs/checkouts/readthedocs.org/user_builds/restrictedpython/checkouts/latest/docs/contributing/ast/python3_2.ast
+++ /home/docs/checkouts/readthedocs.org/user_builds/restrictedpython/checkouts/latest/docs/contributing/ast/python3_3.ast
@@ -1,7 +1,7 @@
--- Python 3.2 AST
--- ASDL's four builtin types are identifier, int, string, object
+-- PYTHON 3.3 AST
+-- ASDL's five builtin types are identifier, int, string, bytes, object
 
-module Python version "3.2"
+module Python version "3.3"
 {
     mod = Module(stmt* body)
         | Interactive(stmt* body)
@@ -32,11 +32,10 @@
          | For(expr target, expr iter, stmt* body, stmt* orelse)
          | While(expr test, stmt* body, stmt* orelse)
          | If(expr test, stmt* body, stmt* orelse)
-         | With(expr context_expr, expr? optional_vars, stmt* body)
+         | With(withitem* items, stmt* body)
 
          | Raise(expr? exc, expr? cause)
-         | TryExcept(stmt* body, excepthandler* handlers, stmt* orelse)
-         | TryFinally(stmt* body, stmt* finalbody)
+         | Try(stmt* body, excepthandler* handlers, stmt* orelse, stmt* finalbody)
          | Assert(expr test, expr? msg)
 
          | Import(alias* names)
@@ -67,6 +66,7 @@
          | GeneratorExp(expr elt, comprehension* generators)
          -- the grammar constrains where yield expressions can occur
          | Yield(expr? value)
+         | YieldFrom(expr value)
          -- need sequences for compare to distinguish between
          -- x < 4 < 3 and (x < 4) < 3
          | Compare(expr left, cmpop* ops, expr* comparators)
@@ -77,7 +77,7 @@
                 expr? kwargs)
          | Num(object n) -- a number as a PyObject.
          | Str(string s) -- need to specify raw, unicode, etc?
-         | Bytes(string s)
+         | Bytes(bytes s)
          | Ellipsis
          -- other literals? bools?
 
@@ -137,7 +137,6 @@
 
     comprehension = (expr target, expr iter, expr* ifs)
 
-    -- not sure what to call the first argument for raise and except
     excepthandler = ExceptHandler(expr? type, identifier? name, stmt* body)
                     attributes (int lineno, int col_offset)
 
@@ -156,4 +155,6 @@
 
     -- import name with optional 'as' alias.
     alias = (identifier name, identifier? asname)
+
+    withitem = (expr context_expr, expr? optional_vars)
 }