Minor rewords

Author: javiereguiluz

messenger.rst

@@ -2132,7 +2132,8 @@ The transport has a number of options:
     If ``true`` it logs all HTTP requests and responses (it impacts performance)
 
 ``delete_on_rejection`` (default: ``true``)
-    If ``false`` instead of deleting the message on reject it will instead change the visibility allowing SQS to handle retries.
+    If set to ``false``, the message will not be deleted when rejected. Instead,
+    its visibility will be changed so that SQS can handle retries
 
 ``endpoint`` (default: ``https://sqs.eu-west-1.amazonaws.com``)
     Absolute URL to the SQS service
@@ -2153,7 +2154,8 @@ The transport has a number of options:
     Name of the AWS region
 
 ``retry_delay`` (default: ``0``)
-    Only used when ``delete_on_rejection`` is set to ``false``. Defines the visibility timeout sent to SQS when a message is rejected.
+    Used only when ``delete_on_rejection`` is ``false``. Defines the visibility
+    timeout (in seconds) that SQS should apply when a message is rejected
 
 ``secret_key``
     AWS secret key (must be urlencoded)