Default value for arrays not rendered correctly with @{DEFAULT-VALUE}

[remkop]

@{DEFAULT-VALUE} is replaced with the array toString() which does not show the values.

The workaround is to use a List instead of an array.

[remkop]

Failing test

    @Test
    public void testCommandShowDefaultValuesVariableForArrayField() {
        @Command(showDefaultValues = true)
        class Params {
            @Option(names = {"-x", "--array"}, required = true, description = "null array: Default: ${DEFAULT-VALUE}")
            int[] nil;
            @Option(names = {"-y", "--other"}, required = true, description = "non-null: Default: ${DEFAULT-VALUE}")
            int[] other = {1, 5, 11, 23};
        }
        String result = usageString(new Params(), Help.Ansi.OFF);
        assertEquals(format("" +
                "Usage: <main class> -x=<nil> [-x=<nil>]... -y=<other> [-y=<other>]...%n" +
                "  -x, --array=<nil>     null array: Default: null%n" +
                "  -y, --other=<other>   non-null: Default: [1, 5, 11, 23]%n"), result);
    }