Literal annotation results in unrecognized parameter

[tvoipio]

🐛 Bug

Papermill 2.7.0

Tagging a cell as parameters and inserting the following definition results in Papermill complaining about unknown parameter if swallow is passed using parameters (CLI argument or keyword argument to execute()):

# previous cell: from typing import Literal
swallow: Literal["african", "european", "unknown"] = "unknown"

This works:

swallow: str = "unknown"

[fzlzjerry]

Reproduced on current main (e4e4ddd). PythonTranslator.PARAMETER_PATTERN only accepts word characters, brackets, commas, and whitespace inside an annotation, so the quotes in Literal["african", ...] prevent the assignment from being recognized at all. That omission is what later produces the unknown-parameter warning.

I have a focused regression test for the reported definition and a small parser fix that treats the annotation as opaque text up to the assignment separator, while retaining the existing handling for quoted forward annotations. The focused translator tests pass; I am running the full suite before opening a draft PR.

[MannXo]

I can pick this up if it's ok?

[fzlzjerry]

Thanks for offering. I already opened #908 with the parser fix and regression coverage described above, and its checks are green. To avoid duplicating the same implementation, that PR is the active fix; additional review or testing there is welcome.