This PR renames the following symbols: * `PySourceType::Jupyter` -> `PySourceType::Ipynb` * `SourceKind::Jupyter` -> `SourceKind::IpyNotebook` * `JupyterIndex` -> `NotebookIndex`
This PR renames the following symbols: * `PySourceType::Jupyter` -> `PySourceType::Ipynb` * `SourceKind::Jupyter` -> `SourceKind::IpyNotebook` * `JupyterIndex` -> `NotebookIndex`