@fokko @ashb I have just added a note now that we should use `None` and Not `"None"` . Can you review this again please?
@ashb - regarding deprecation - we are not removing any functionality now, I have changed the PR and it just adds a note :) [ Full content available at: https://github.com/apache/incubator-airflow/pull/3846 ] This message was relayed via gitbox.apache.org for [email protected]
