diff -r c5ef12cfcb44 -r 7c078db2df2c Doc/library/multiprocessing.rst
--- a/Doc/library/multiprocessing.rst	Thu Oct 07 13:06:49 2010 +0200
+++ b/Doc/library/multiprocessing.rst	Thu Oct 07 22:24:12 2010 +0200
@@ -1757,8 +1757,8 @@
    If *authenticate* is ``True`` (``False`` by default) or *authkey* is not
    ``None`` then digest authentication is used.
 
-   If *authkey* is a string then it will be used as the authentication key;
-   otherwise it must be *None*.
+   If *authkey* is a string (and in that case it must be a byte string) then it
+   will be used as the authentication key; otherwise it must be *None*.
 
    If *authkey* is ``None`` and *authenticate* is ``True`` then
    ``current_process().authkey`` is used as the authentication key.  If
@@ -1807,14 +1807,14 @@
    from array import array
 
    address = ('localhost', 6000)     # family is deduced to be 'AF_INET'
-   listener = Listener(address, authkey='secret password')
+   listener = Listener(address, authkey=b'secret password')
 
    conn = listener.accept()
    print('connection accepted from', listener.last_accepted)
 
    conn.send([2.25, None, 'junk', float])
 
-   conn.send_bytes('hello')
+   conn.send_bytes(b'hello')
 
    conn.send_bytes(array('i', [42, 1729]))
 
@@ -1828,7 +1828,7 @@
    from array import array
 
    address = ('localhost', 6000)
-   conn = Client(address, authkey='secret password')
+   conn = Client(address, authkey=b'secret password')
 
    print(conn.recv())                  # => [2.25, None, 'junk', float]