{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"x"}]}
            x if x.starts_with("edition") => {}
            "test_harness" | "compile_fail" => seen_rust_tags = !seen_other_tags || seen_rust_tags,
            x if x.starts_with('E') && x.len() == 5 => {