Update with-s3-example.md

In the Event JSON (Heading: Test in the console, Point: 2. iv), for the key "arn", the value "example-bucket" was written. Ideally, it should be "my-s3-bucket" because "my-s3-bucket" is the value for the bucket name.

Also, in the test event JSON template that is provided in the "Configure test event" menu on lambda function's page, test/key is written as "test%2Fkey". So, updated that as well.

Author: namit2saxena

doc_source/with-s3-example.md

@@ -164,7 +164,7 @@ Invoke the Lambda function manually using sample Amazon S3 event data\.
 
    1. For **Event name**, enter a name for the test event\. For example, **mys3testevent**\.
 
-   1. In the test event JSON, replace the S3 bucket name \(`example-bucket`\) and object key \(`test/key`\) with your bucket name and test file name\. Your test event should look similar to the following:
+   1. In the test event JSON, replace the S3 bucket name \(`example-bucket`\) and object key \(`test%2Fkey`\) with your bucket name and test file name (that you uploaded in your bucket)\. Your test event should look similar to the following:
 
       ```
       {
@@ -193,7 +193,7 @@ Invoke the Lambda function manually using sample Amazon S3 event data\.
                 "ownerIdentity": {
                   "principalId": "EXAMPLE"
                 },
-                "arn": "arn:aws:s3:::example-bucket"
+                "arn": "arn:aws:s3:::my-s3-bucket"
               },
               "object": {
                 "key": "HappyFace.jpg",
@@ -297,4 +297,4 @@ You can now delete the resources that you created for this tutorial, unless you
 
 ## Next steps<a name="next-steps"></a>
 
-Try the more advanced tutorial\. In this tutorial, the S3 trigger invokes a function to [create a thumbnail image](with-s3-tutorial.md) for each image file that is uploaded to your S3 bucket\. This tutorial requires a moderate level of AWS and Lambda domain knowledge\. You use the AWS Command Line Interface \(AWS CLI\) to create resources, and you create a \.zip file archive deployment package for your function and its dependencies\.
+Try the more advanced tutorial\. In this tutorial, the S3 trigger invokes a function to [create a thumbnail image](with-s3-tutorial.md) for each image file that is uploaded to your S3 bucket\. This tutorial requires a moderate level of AWS and Lambda domain knowledge\. You use the AWS Command Line Interface \(AWS CLI\) to create resources, and you create a \.zip file archive deployment package for your function and its dependencies\.