Empty line added after executing publish_display_data

[maximlt]

I've observed that importing hvplot in a notebook adds a few empty lines in the output cell (holoviz/holoviews#5154):

After some digging I found that that under the hood it was using the publish_display_data function of the IPython.display module. When executed in a notebook (here with Jupyter lab) this function does indeed add an empty line every time it's called:

• Is this a bug?
• Is there a way to prevent this behavior?

A more general question would be to ask if there's another way to inject javascript/css/json code/data in a notebook rather than by publish_display_data? It seems to me that what is required by hvplot in the first example I shared (handled by Panel under the hood) could be added in the global metadata of the notebook instead of in a particular cell. But I'm not well versed in the Jupyter format and comms so feel free to ignore this question if totally irrelevant ;) !

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