chore: formatting

README.md

@@ -52,11 +52,11 @@ app.start();
 - The queue is polled continuously for messages using [long polling](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-long-polling.html).
 - Throwing an error (or returning a rejected promise) from the handler function will cause the message to be left on the queue. An [SQS redrive policy](https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/SQSDeadLetterQueue.html) can be used to move messages that cannot be processed to a dead letter queue.
 - By default messages are processed one at a time – a new message won't be received until the first one has been processed. To process messages in parallel, use the `batchSize` option [detailed below](#options).
-    - It's also important to await any processing that you are doing to ensure that messages are processed one at a time.
+  - It's also important to await any processing that you are doing to ensure that messages are processed one at a time.
 - By default, messages that are sent to the `handleMessage` and `handleMessageBatch` functions will be considered as processed if they return without an error.
-    - To acknowledge individual messages, please return the message that you want to acknowledge if you are using `handleMessage` or the messages for `handleMessageBatch`.
-        - To note, returning an object or an array will be considered an acknowledgement of no message(s) and will result in no messages being deleted.
-        - By default, if an object or an array is not returned, all messages will be acknowledged.
+  - To acknowledge individual messages, please return the message that you want to acknowledge if you are using `handleMessage` or the messages for `handleMessageBatch`.
+    - To note, returning an object or an array will be considered an acknowledgement of no message(s) and will result in no messages being deleted.
+    - By default, if an object or an array is not returned, all messages will be acknowledged.
 - Messages are deleted from the queue once the handler function has completed successfully (the above items should also be taken into account).
 
 ### Credentials