add default values for tuples and non empty iterable/sequential for quick fix

Add these types of default values, for instance :
    {Integer+} a = {0};
    [Integer+] a = [0];
    [Integer, String] a = [0, ""];
    [Integer, String, Float*] a = [0, ""];
    [Integer, String, Float+] a = [0, "", 0.0];