Fix missing printoptions doc page from autosummary filename collision

[ayaangazali]

Proposed changes

Building the docs warns:

docs/src/python/printoptions.rst:6: WARNING: autosummary: stub file not found
'mlx.core.printoptions'. Check your autosummary_generate setting.

PrintOptions (the class) and printoptions (the context manager) differ only in case, so autosummary wants to write mlx.core.PrintOptions.rst and mlx.core.printoptions.rst into the same directory. On a case insensitive filesystem, which macOS is by default, those are the same path, so one clobbers the other and printoptions ends up with no page.

Before this change _autosummary contains three files and the function is missing:

mlx.core.PrintOptions.rst  mlx.core.get_printoptions.rst  mlx.core.set_printoptions.rst

After, all four exist:

printoptions_class.rst  mlx.core.printoptions.rst  mlx.core.get_printoptions.rst  mlx.core.set_printoptions.rst

This is the same collision mlx.core.Stream and mlx.core.stream already had, so I fixed it the same way the existing entry does, by mapping the class to its own filename. Reverting the change brings the warning back, so it is the cause.

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING document
• I have run pre-commit run --all-files to format my code / installed pre-commit prior to committing changes
• I have added tests that prove my fix is effective or that my feature works
• I have updated the necessary documentation (if needed)

(docs config only; verified by building the docs before and after)

---

quick disclosure: freshman contributor, i use Claude Code when hunting, but i found this by actually building the docs and reading the warnings, then confirmed the case collision by listing the generated stubs both ways. i picked printoptions_class to match the existing stream_class naming, happy to rename if you prefer something else.