TV4Fun opened a new pull request #7098: [AIRFLOW-4453] Make behavior of 
`none_failed` consistent with documentation
URL: https://github.com/apache/airflow/pull/7098
 
 
   The documentation for the `none_failed` trigger rule
   (https://airflow.apache.org/docs/stable/concepts.html#trigger-rules)
   describes its behavior as "all parents have not failed (`failed` or
   `upstream_failed`) i.e. all parents have succeeded or been skipped."
   With that definition in mind, there is no reason that the check for
   `none_failed` should ever have to check for skipped upstream tasks or
   set the current task to `skipped`. The current behavior causes the rule
   to skip if all upstream tasks have skipped, which is more than a little
   confusing. This fixes the behavior to be consistent with the documentation.
   
   ---
   Issue link: WILL BE INSERTED BY 
[boring-cyborg](https://github.com/kaxil/boring-cyborg)
   
   - [X] Description above provides context of the change
   - [X] Commit message/PR title starts with `[AIRFLOW-NNNN]`. AIRFLOW-NNNN = 
JIRA ID<sup>*</sup>
   - [X] Unit tests coverage for changes (not needed for documentation changes)
   - [X] Commits follow "[How to write a good git commit 
message](http://chris.beams.io/posts/git-commit/)"
   - [X] Relevant documentation is updated including usage instructions.
   - [X] I will engage committers as explained in [Contribution Workflow 
Example](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#contribution-workflow-example).
   
   <sup>*</sup> For document-only changes commit message can start with 
`[AIRFLOW-XXXX]`.
   
   ---
   In case of fundamental code change, Airflow Improvement Proposal 
([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+Proposals))
 is needed.
   In case of a new dependency, check compliance with the [ASF 3rd Party 
License Policy](https://www.apache.org/legal/resolved.html#category-x).
   In case of backwards incompatible changes please leave a note in 
[UPDATING.md](https://github.com/apache/airflow/blob/master/UPDATING.md).
   Read the [Pull Request 
Guidelines](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#pull-request-guidelines)
 for more information.
   

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