With superfences: <<join>> and <<choice>> not rendered

[johnny]

When using the superfences configuration as per the docs, <<join>> and <<choice>> are not rendered correctly:

  - pymdownx.superfences:
      custom_fences:
        - name: mermaid
          class: mermaid
          format: !!python/name:mermaid2.fence_mermaid_custom

This results choice and join nodes to be rendered as standard text nodes in the stateDiagram-v2

Example diagram:

stateDiagram-v2
    state split <<choice>>
    [*] --> split
    split --> one: Option 1
    split --> two: Option 2

With superfences Without superfences

[github-actions[bot]]

Thank you for your contribution! This is very appreciated.

[fralau]

Thanks: define "correctly", in terms of what you expected?

Also, specify what theme you are using?

[johnny]

Correct would be the diamond. Incorrect is the name "split"

I'm using mkdocs material