Thomas Kluyver

No, I figured that wasn't likely to help directly, but I thought it might help understand what's failing. From the commit message, I think it was moving from Ubuntu 12.04...

I'm not planning to work on it myself, but if you figure out a suitable alternative and want to make a PR, I think we'd consider it. @flying-sheep does most...

That suggests that something to do with our [handle_message](https://github.com/IRkernel/IRkernel/blob/abb7528226aa072db80d92f2f3c6424071db77dd/R/execution.r#L178-L180) function is going wrong.

AFAIK we don't have any extension mechanism at the moment. We'll consider this a feature request. @flying-sheep any thoughts on how extensions would work?

It's that kind of thing, yeah. IPython also has hooks extensions can use to modify code before it's run - e.g. if you want `1/2` to make a fraction rather...

Can you give a concrete example of what to do, what the results are and what they should be?

I think something like that is what generates the recordedplot object already. I'm not confident we'd come up with something better than the mechanism already in evaluate.

`plot_builds_upon` is equivalent to some logic in knitr (though not a copy of the code, because GPL...). I know it's somewhat hackish, but it's not very big and hopefully shouldn't...

I'm not sure how many issues this would fix. We fixed a bunch of things by being smarter about which output formats we draw, and by ensuring SVG plots are...

Maybe I'm just misreading what's normal conversation in Germany, but allow me to deploy a tactic we use when conversations get a bit heated... Kittens!