support downgrading notebooks with nbconvert...
support downgrading notebooks with nbconvert
Use:
ipython nbconvert --to notebook --nbformat 3 notebook.ipynb
to write `notebook.v3.ipynb`
Adds `output_suffix` resource, inserted before file ext.
Suffix is used if `--output` is not specified.
Default is `.nbconvert`, to prevent `--to notebook` from clobbering existing notebooks by default.