Function arg_make_syntax_err_help_msg

pub unsafe extern "C" fn arg_make_syntax_err_help_msg(
    ds: *mut _internal_arg_dstr,
    name: *mut u8,
    help: i32,
    nerrors: i32,
    argtable: *mut *mut c_void,
    end: *mut arg_end,
    exitcode: *mut i32,
) -> i32