Ruff formatting: do not add linebreak between function call parentheses and dictionary literal

[vitalii-diachkov-sumup]

Is there any way to configure ruff to produce the following formatting:

some_function({
    "foo": "bar",
    "baz": "qux",
})

instead of

some_function(
    {
        "foo": "bar",
        "baz": "qux",
    }
)

i.e. for functions or expressions that takes dict as the only argument do not add linebreak between parentheses and brackets

[MichaReiser]

There's no such option today but this is implemented as a preview style. You can enable it with format.preview = true. But this may enable other preview styles as well (I don't think there are any at the moment but we may change the preview style in any release).

https://play.ruff.rs/bdfee16c-e957-44e2-8256-c59c52e98510

[vitalii-diachkov-sumup]

Thanks for the reply 🙏 that was exactly what I was looking for
Do you know in which release this preview style will become the default one?

[vitalii-diachkov-sumup]

Or do you know how can I explicitly set only this preview rule in my config? I found that this is somehow possible according to the docs, https://docs.astral.sh/ruff/preview/#selecting-single-preview-rules, I just don't know the name of the rule/format in which I have to set it explicitly in my ruff.toml

[MichaReiser]

The formatter doesn't allow opting into individual preview styles. You can only enable all or no preview style formatting using format.preview = true`.

We don't have a timeline for this specific feature because it would be a fairly big deviation from black's style.

[vitalii-diachkov-sumup]

It's sad that there's no option to list what features you want to have in preview mode.
Anyway, I guess if we decide to switch to this kind of formatting on our project we can just pin current ruff version and that would be the only experimental formatting rule enabled as you mentioned before