PR feedback

Author: tg-msft

azure/Guidelines.md

@@ -300,6 +300,8 @@ There are 2 kinds of errors:
 
 :white_check_mark: **DO** carefully craft unique `x-ms-error-code` string values for errors that are recoverable at runtime.  Reuse common error codes for usage errors that are not recoverable.
 
+:heavy_check_mark: **YOU MAY** group common customer code errors into a few `x-ms-error-code` string values.
+
 :white_check_mark: **DO** ensure that the top-level error's `code` value is identical to the `x-ms-error-code` header's value.
 
 :white_check_mark: **DO** provide a response body with the following structure:
@@ -343,8 +345,6 @@ Example:
 }
 ```
 
-:heavy_check_mark: **YOU MAY** group common customer code errors into a few `x-ms-error-code` string values.
-
 :white_check_mark: **DO** document the service's top-level error code strings; they are part of the API contract.
 
 :heavy_check_mark: **YOU MAY** treat the other fields as you wish as they are _not_ considered part of your service's API contract and customers should not take a dependency on them or their value. They exist to help customers self-diagnose issues.