exec won't take file objects anymore

Doc/library/functions.rst

@@ -391,16 +391,15 @@ are always available.  They are listed here in alphabetical order.
 
 .. function:: exec(object[, globals[, locals]])
 
-   This function supports dynamic execution of Python code. *object* must be either
+   This function supports dynamic execution of Python code. *object* must be
-   a string, an open file object, or a code object.  If it is a string, the string
+   either a string or a code object.  If it is a string, the string is parsed as
-   is parsed as a suite of Python statements which is then executed (unless a
+   a suite of Python statements which is then executed (unless a syntax error
-   syntax error occurs).  If it is an open file, the file is parsed until EOF and
+   occurs).  If it is a code object, it is simply executed.  In all cases, the
-   executed.  If it is a code object, it is simply executed.  In all cases, the
    code that's executed is expected to be valid as file input (see the section
-   "File input" in the Reference Manual). Be aware that the :keyword:`return` and
+   "File input" in the Reference Manual). Be aware that the :keyword:`return`
-   :keyword:`yield` statements may not be used outside of function definitions even
+   and :keyword:`yield` statements may not be used outside of function
-   within the context of code passed to the :func:`exec` function. The return value
+   definitions even within the context of code passed to the :func:`exec`
-   is ``None``.
+   function. The return value is ``None``.
 
    In all cases, if the optional parts are omitted, the code is executed in the
    current scope.  If only *globals* is provided, it must be a dictionary, which