Synopsis for composite groups does not expand for n..* (n > 1)

[remkop]

For example:

    static class CompositeGroupDemo {

        @ArgGroup(exclusive = false, multiplicity = "2..*")
        List<Composite> composites;

        static class Composite {
            @ArgGroup(exclusive = false, multiplicity = "2..*")
            Dependent dependent;

            @ArgGroup(exclusive = true, multiplicity = "1")
            Exclusive exclusive;
        }

        static class Dependent {
            @Option(names = "-a", required = true)
            int a;
            @Option(names = "-b", required = true)
            int b;
            @Option(names = "-c", required = true)
            int c;
        }

        static class Exclusive {
            @Option(names = "-x", required = true)
            boolean x;
            @Option(names = "-y", required = true)
            boolean y;
            @Option(names = "-z", required = true)
            boolean z;
        }
    }