Jupytext

------------------

**Fixed**

- Fixed implicit dependency on `jupyter_client` ([245](https://github.com/mwouts/jupytext/issues/245))

------------------

**Added**

- New argument `--set-kernel` in Jupytext command line ([230](https://github.com/mwouts/jupytext/issues/230))
- Jupytext now accepts `--to script` or `--to auto` ([240](https://github.com/mwouts/jupytext/issues/240))
- Jupytext now has a real Sphinx documentation on [readthedocs](https://jupytext.readthedocs.io/en/latest), thanks to Chris Holdgraf ([#237](https://github.com/mwouts/jupytext/issues/237))

**Fixed**

- Invalid notebooks may cause a warning, but not a fatal error ([234](https://github.com/mwouts/jupytext/issues/234))
- Jupyter server extension leaves the contents manager unchanged if it is a sub-class of Jupytext's CM ([236](https://github.com/mwouts/jupytext/issues/236))
- Fixed format inference when metadata is present but not format information ([239](https://github.com/mwouts/jupytext/issues/239))
- Preserve executable and encoding information in scripts with metadata ([241](https://github.com/mwouts/jupytext/issues/241))

------------------

**Added**

- Support for IDL notebooks and .pro scripts ([232](https://github.com/mwouts/jupytext/issues/232))

------------------

**Added**

- Jupytext's content manager has a new `notebook_extensions` option ([224](https://github.com/mwouts/jupytext/issues/224), [#183](https://github.com/mwouts/jupytext/issues/183))
- Cells can be made inactive in scripts with the `active-ipynb` cell tag ([226](https://github.com/mwouts/jupytext/issues/226))

**Fixed**

- Directories ending in .jl (or .ipynb) are not notebooks ([228](https://github.com/mwouts/jupytext/issues/228))
- Empty notebooks have no language ([227](https://github.com/mwouts/jupytext/issues/227))

------------------

**Added**

- Jupytext server extension leaves the contents manager unchanged when it is already a subclass of TextFileContentsManager ([218](https://github.com/mwouts/jupytext/issues/218))
- The base class for TextFileContentsManager defaults to FileContentsManager when LargeFileManager is not available ([217](https://github.com/mwouts/jupytext/issues/217))

------------------

**Added**

- Markdown and R Markdown formats now support metadata ([66](https://github.com/mwouts/jupytext/issues/66), [#111](https://github.com/mwouts/jupytext/issues/111), [#188](https://github.com/mwouts/jupytext/issues/188))
- The `light` format for Scripts can use custom cell markers, e.g. Vim or VScode/PyCharm folding markers ([199](https://github.com/mwouts/jupytext/issues/199))
- Pandoc's Markdown format for Jupyter notebooks is available in Jupytext as `md:pandoc` ([208](https://github.com/mwouts/jupytext/issues/208))

**Fixed**

- Jupytext's contents manager is now based on `LargeFileManager` to allow large file uploads ([210](https://github.com/mwouts/jupytext/issues/210))
- YAML header parsed with yaml.safe_load rather than yaml.load ([215](https://github.com/mwouts/jupytext/issues/215))
- IPython line magic can be split across lines ([209](https://github.com/mwouts/jupytext/issues/209))
- `jupytext --to py` rather than `--to python` in the README ([216](https://github.com/mwouts/jupytext/issues/216))