issues: 963318000

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
963318000 MDExOlB1bGxSZXF1ZXN0NzA1OTU2MDMx 5684 Initialize custom backends in open_dataset 14371165 closed 0     4 2021-08-07T23:07:33Z 2021-10-09T23:49:55Z 2021-10-09T23:49:55Z MEMBER   0 pydata/xarray/pulls/5684

The backend classes are initialized in the build_engine function: https://github.com/pydata/xarray/blob/8b95da8e21a9d31de9f79cb0506720595f49e1dd/xarray/backends/plugins.py#L93

This wasn't the case for custom backends: https://github.com/pydata/xarray/blob/8b95da8e21a9d31de9f79cb0506720595f49e1dd/xarray/backends/plugins.py#L161

This PR initializes the engine, fixes the incorrect signature in the test (#5033) and reverts the doc changes done in #5532.

  • [x] Tests added
  • [x] Passes pre-commit run --all-files
  • [x] User visible changes (including notable bug fixes) are documented in whats-new.rst
 
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