#400482 by sun: Fixed editor.instance.prepareContent() breaks editor's native markup handling. Drupal plugin authors should add the CSS class 'drupal-content' to prevent the editor selection to activate internal editor buttons.

#319363 by sun, quicksketch: Rewrote editor plugin API.  The new plugin API allows Drupal modules to expose editor plugins for ANY editor without implementing editor-specific code.  Major milestone for better content-editing in Drupal.

WELCOME to the next generation of content-editing in Drupal!  8)