{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"assert_eq_pnsat!(\"%-10s\","}]}
    assert_eq_pnsat!("%-10s", Some("{:<10}"));
    assert_eq_pnsat!("%#x", Some("{:#x}"));
    assert_eq_pnsat!("%*s", None);