Ruff 0.2.1

The following snippet illustrates a TRIO115 false positive when sleep() is passed a variable whose initial value was 0, but changes later in a loop construct. Similar to #9934, this is already fixed in flake8-trio. This seems to be strongly indicating that recent fixes to flake8-trio need to be ported in general.

import trio

async def main() -> None:
    sleep = 0
    for _ in range(2):
        # ↓↓↓↓↓ TRIO115 [*] Use `trio.lowlevel.checkpoint()` instead of `trio.sleep(0)`
        await trio.sleep(sleep)
        sleep = 10

trio.run(main)