[Fix error] unsafe-fixes introduces a syntax error

[zegervdv]

When running ruff check --fix --unsafe-fixes (no extra settings or config) on the following code snippet:

foo_tooltip = (
    lambda x, data: f"\nfoo: {data['foo'][int(x)]}"
    if data["foo"] is not None
    else ""
)

Ruff introduces a syntax error and reverts the fix.
The rule code to fix is E731:

test.py:1:1: E731 Do not assign a `lambda` expression, use a `def`

[ntBre]

Thanks, I can reproduce this by applying the fix in the playground. The output looks like this:

def foo_tooltip(x, data):
    return f"\nfoo: {data['foo'][int(x)]}"
    if data["foo"] is not None
    else ""

It looks like wrapping the returned value in parentheses fixes it.