+* Split debug tools between the engine files. You do not need to add debug plugin to the editor if you want to use `--debug engine` building flag anymore. Closes [ckeditor/ckeditor5#5649](https://github.com/ckeditor/ckeditor5/issues/5649). ([353f091](https://github.com/ckeditor/ckeditor5-engine/commit/353f091))
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