{"ast_node_type":"function","tokens":[{"end":54,"kind":"keyword","start":0,"text":"r#\"fn"}]}
            r#"fn x() -> u8 { { [$0({ 0 } + 1)] } }"#,
            remove_parentheses,
            r#"fn x() -> u8 { { [{ 0 } + 1] } }"#,