Try Jupyter notebook not 100% working

[SylvainCorlay]

Some cells of the Julia notebook on https://jupyter.org/try don't appear to work as expected.

It seems likely that this notebook was written for an older version of IJulia and has not been updated since.

It could be a good idea to update this content so that the main Jupyter website points to a better working example.

[JamesWrigley]

Thanks for the report, I believe at least one of the errors I saw is because of a regression from a recent IJulia refactor.