Fix whitespace

Author: stp-ip

ADVANCED.md

@@ -182,11 +182,9 @@ docker run \
          -e AWS_DEBUG=true \
          -e AWS_CALLING_FORMAT=OrdinaryCallingFormat \
          -p 5000:5000 \
-
          registry
 ```
 
-
 ## Microsoft Azure Blob Storage
 
 In order to use Microsoft Azure Blob Storage Service, you need to create a
@@ -256,4 +254,3 @@ test:
     email_exceptions:
         smtp_host: localhost
 ```
-