another fix attempt for docs

docs/utils/download.rst

@@ -16,29 +16,33 @@ standard links from on-prem servers, while the second downloads data from the `A
 Example Usage
 ==============
 .. code-block:: python
-data_url = 'https://heasarc.gsfc.nasa.gov/FTP/chandra/data/byobsid/2/3052/primary/acisf03052N004_cntr_img2.jpg'
-image_file = http_download(url=data_url)
 
-s3_uri = 's3://nasa-heasarc/chandra/data/byobsid/2/3052/primary/acisf03052N004_cntr_img2.jpg'
-image2_file = aws_download(uri=data_url)
+    data_url = 'https://heasarc.gsfc.nasa.gov/FTP/chandra/data/byobsid/2/3052/primary/acisf03052N004_cntr_img2.jpg'
+    image_file = http_download(url=data_url)
+
+    s3_uri = 's3://nasa-heasarc/chandra/data/byobsid/2/3052/primary/acisf03052N004_cntr_img2.jpg'
+    image2_file = aws_download(uri=data_url)
 
 
 or
 .. code-block:: python
-s3_key = 'chandra/data/byobsid/2/3052/primary/acisf03052N004_cntr_img2.jpg's
-s3_bucket = 'nasa-heasarc'
-image2_file = aws_download(bucket=s3_bucket, key=s3_key)
+
+    s3_key = 'chandra/data/byobsid/2/3052/primary/acisf03052N004_cntr_img2.jpg's
+    s3_bucket = 'nasa-heasarc'
+    image2_file = aws_download(bucket=s3_bucket, key=s3_key)
 
 
 If the aws data requires authentication, a credential profile (e.g. `aws_user` profile in ``~/.aws/credentials``) can be passed:
 .. code-block:: python
-image2_file = aws_download(bucket=s3_bucket, key=s3_key, aws_profile='aws_user')
+
+    image2_file = aws_download(bucket=s3_bucket, key=s3_key, aws_profile='aws_user')
 
 
 A session (instance of ``boto3.session.Session``) can also be passed instead (see detials in `AWS session documentation`_).
 .. code-block:: python
-s3_session = boto3.session.Session(aws_access_key_id, aws_secret_access_key)
-image2_file = aws_download(bucket=s3_bucket, key=s3_key, session=s3_session)
+
+    s3_session = boto3.session.Session(aws_access_key_id, aws_secret_access_key)
+    image2_file = aws_download(bucket=s3_bucket, key=s3_key, session=s3_session)
 
 
 .. _Amazon S3 storage: https://aws.amazon.com/s3/