FileIO.readinto() isn't going anywhere

Doc/library/io.rst

@@ -438,9 +438,6 @@ Raw File I/O
       the number actually written. Only one system call is made, so it
       is possible that only some of the data is written.
 
-   Note that the inherited ``readinto()`` method should not be used on
-   :class:`FileIO` objects.
-
 
 Buffered Streams
 ----------------

Modules/_fileio.c

@@ -887,7 +887,7 @@ PyDoc_STRVAR(tell_doc,
 "tell() -> int.	 Current file position");
 
 PyDoc_STRVAR(readinto_doc,
-"readinto() -> Undocumented.  Don't use this; it may go away.");
+"readinto() -> Same as RawIOBase.readinto().");
 
 PyDoc_STRVAR(close_doc,
 "close() -> None.  Close the file.\n"