extra info: we run platform-agnostic box tests via...

# python-contributors

[Piotr Krzemiński]

extra info: we run platform-agnostic box tests via GitHub actions and CI ensures that these files are up to date:
• https://github.com/krzema12/kotlin-python/blob/python-backend/python/experiments/failed-tests.txt
• https://github.com/krzema12/kotlin-python/blob/python-backend/python/experiments/out_ir.py
• https://github.com/krzema12/kotlin-python/blob/python-backend/python/experiments/missing.txt - missing only from the perspective of compiling a very simple Kotlin code + standard library (python.kt)