Rust functions don't include annotations

[pokey]

In the following function:

    #[test]
    fn test_revset_parse_parentheses() -> eyre::Result<()> {
        insta::assert_debug_snapshot!(parse("((foo()))"), @r###"
        Ok(
            FunctionCall(
                "foo",
                [],
            ),
        )
        "###);

        Ok(())
    }

Using the funk modifier does not include the line #[test]. For consistency with python, where we include decorators, this line should be included