{"ast_node_type":"other","tokens":[{"end":52,"kind":"keyword","start":0,"text":"assert_eq_pnsat!(\"%-10.10s\","}]}
    assert_eq_pnsat!("%-10.10s", Some("{:<10.10}"));
    assert_eq_pnsat!("%10s", Some("{:>10}"));
    assert_eq_pnsat!("%1$d", Some("{0}"));