ucg/integration_tests/concatenation_test.ucg

assert {
    ok = "hello " + "world" == "hello world",
    desc = "\"hello \" + \"world\" == \"hello world\"",
};
assert {
    ok = [1, 2, 3] + [4, 5, 6] == [1, 2, 3, 4, 5, 6],
    desc = "[1, 2, 3] + [4, 5, 6] == [1, 2, 3, 4, 5, 6]",
};