Function R_pretty

pub unsafe extern "C" fn R_pretty(
    lo: *mut c_double,
    up: *mut c_double,
    ndiv: *mut c_int,
    min_n: c_int,
    shrink_sml: c_double,
    high_u_fact: *mut c_double,
    eps_correction: c_int,
    return_bounds: c_int,
) -> c_double