Formatting document is inconsistent between ruff and air

[juliasilge]

Originally posted by @juliasilge in #754 (review):

I'm supportive of us merging this because it gives us an improvement, but I want to highlight a difference in results between very similar formatters, when you use Format Document.

If you have settings like this:

{
    "[python]": {
        "editor.defaultFormatter": "charliermarsh.ruff"
    },
    "[r]": {
        "editor.defaultFormatter": "Posit.air-vscode"
    },
    "[quarto]": {
        "editor.defaultFormatter": "quarto.quarto"
    }
}

And two .qmd files like this:

---
title: "Untitled"
format: html
---

```{python}
1 + 1
```


Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

```{python}
from typing import Iterable

import os


def sum_even_numbers(numbers: Iterable[int]) -> int:
    """Given an iterable of integers, return the sum of all even numbers in the iterable."""
    return sum(
        num for num in numbers
        if num % 2 == 0
    )
```

Second one:

---
title: "Untitled"
format: html
---

```{r}
1 + 1
```


Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.

```{r}
list(foobar, foobar, foobar, foobar, foobar, foobar, foobar, foobar, foobar, foobar, foobar, foobar)
```

• Put your cursor in the 1 + 1 code cell
• Run Format Document
• In the R file, the other code cell will get formatted, which is what I would argue is the correct behavior
• In the Python file, the other code cell not get formatted, which I think is not right

If you run Format Document from the code cell that needs formatting, the behavior is the same for both; it does format that code cell. The command Quarto: Format Cell also works well for both files.

We can log this problem to follow up on.