Add Robot Framework (.robot) -language support

[datakurre]

• document the language extension and comment by adding one line to _SCRIPT_EXTENSIONS in languages.py.
• contribute a sample notebook in tests/notebooks/ipynb_[language].
• add two tests in test_mirror.py: one for the light format, and another one for the percent format.
• Make sure that the tests pass, and that the text representations of your notebook, found in tests/notebooks/mirror/ipynb_to_script and tests/notebooks/mirror/ipynb_to_percent, are valid scripts.

[codecov]

Codecov Report

Merging #378 into master will decrease coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #378      +/-   ##
=========================================
- Coverage   99.05%   98.9%   -0.16%     
=========================================
  Files          75      75              
  Lines        7431    7273     -158     
=========================================
- Hits         7361    7193     -168     
- Misses         70      80      +10

Impacted Files	Coverage Δ
jupytext/languages.py	100% <ø> (ø)	⬆️
jupytext/pep8.py	95.23% <0%> (-4.77%)	⬇️
jupytext/jupytext.py	98.59% <0%> (-1.41%)	⬇️
jupytext/cli.py	95.48% <0%> (-0.85%)	⬇️
jupytext/cell_reader.py	96.75% <0%> (-0.19%)	⬇️
tests/test_pep8.py	98.36% <0%> (-0.03%)	⬇️
tests/test_cli.py	100% <0%> (ø)	⬆️
tests/test_black.py	100% <0%> (ø)	⬆️
tests/test_active_cells.py	100% <0%> (ø)	⬆️
tests/test_knitr_spin.py	100% <0%> (ø)	⬆️
... and 22 more

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[mwouts]

Awesome! Thank you @datakurre . By the way I see that the instructions for adding a new language were not completely up-to-date (adding test functions is not required any more), so I've fixed them.

Thanks again for your contribution!

[datakurre]

Awesome! Thanks for polishing things up! We will bundle this with
https://robots-from-jupyter.github.io/

[mwouts]

I am looking forward to seeing that! Just to let you know, I hope to release the next version (1.3) within one or two weeks.

[datakurre]

Bundled! https://github.com/robots-from-jupyter/robotlab/releases/tag/v2019.12.0

Thank you! .robot => .ipynb conversion from new .robot-file needs some work, but that probably something I knowing the robot format should contribute 😄 .robot files converted from .ipynb-notebooks work as expected.

[mwouts]

Awesome! Thanks for letting me know.

.robot => .ipynb conversion from new .robot-file needs some work, but that probably something I knowing the robot format should contribute

Tell me a bit more about the issue... Maybe we'll have to improve the format documentation? Also, did you give a try to the percent format? It's a bit more verbose as every cell needs to be prefixed with # %%, but maybe it's easier to use as it is more explicit.

[datakurre]

@mwouts Better late than never. Thank you.

jupytext --from robot:percent foo.robot --to ipynb

works well enough. Unprepared .robot will become a single big cell, which is easy to split with Jupyter Notebook or Lab. And after this "initial import", light format works well.

This is reasonable workflow.

[mwouts]

Hi @datakurre , you're welcome! And thank you for your contribution as well!

Oh yes, using the percent format on a non-percent file will give just one cell. But maybe your experience with the light format not able to parse a script means that we may want to improve it - do not hesitate if you can share one of the robot scripts that is not correctly parsed!