Problem/Motivation
Try adding custom class or cite attribute to your q tag in source, Drupal strips them out.
Proposed resolution
Check MR.
Once applied you just need to add <q class cite> to your Source editing configuration to be able to define custom class or cite attributes on your q tag.
Issue fork ckeditor5_inline_quote-3558203
Show commands
Start within a Git clone of the project using the version control instructions.
Or, if you do not have SSH keys set up on git.drupalcode.org:
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