Get rid of activate()

[flying-sheep]

We need to set the default converter used. This line means it’s impossible to override it without reaching into __init__’s defaults dict created at module execution time.

So feasibly, we either

• replace the registered magics
• or just provide our own plugin module with def load_ipython_extension(ip): ...

TODO

• remove activate()
• keep %%R magic working without manually specifying --converter