def METHOD_NAME(rule_runner: RuleRunner) -> None:
    rule_runner.write_files(
        {
            "good/src/f.rs": GOOD_FILE,
            "good/Cargo.toml": "",
            "good/BUILD": "rust_package()",
            "bad/src/f.rs": BAD_FILE,
            "bad/Cargo.toml": "",
            "bad/BUILD": "rust_package()",
        }
    )
    tgts = [rule_runner.get_target(Address("good")), rule_runner.get_target(Address("bad"))]
    fmt_result = run_rustfmt(rule_runner, tgts)
    assert fmt_result.output == rule_runner.make_snapshot(
        {"good/src/f.rs": GOOD_FILE, "bad/src/f.rs": FIXED_BAD_FILE},
    )
    assert fmt_result.did_change is True