Fixed rst errors

kombu/connection.py

@@ -263,7 +263,7 @@ class BrokerConnection(object):
           :class:`~kombu.entity.Queue`.
         :keyword exchange_opts: Additional keyword arguments passed to the
           constructor of the automatically created
-          :class:`~kombu.entity.Exchange.
+          :class:`~kombu.entity.Exchange`.
         :keyword channel: Channel to use. If not specified a new channel
            from the current connection will be used. Remember to call
            :meth:`~kombu.simple.SimpleQueue.close` when done with the

kombu/messaging.py

@@ -21,7 +21,7 @@ class Producer(object):
     :keyword on_return: Callback to call for undeliverable messages,
         when ``mandatory`` or ``imediate`` is used. This callback
         needs the following signature:
-        ``(exception, exchange, routing_key, message).
+        ``(exception, exchange, routing_key, message)``.
 
     .. attribute:: channel