> The documentation clearly states:
>
> <http://lilypond.org/doc/v2.25/Documentation/extending/markup-command-definition-syntax>
>
> Arguments are distinguished according to their type:
> • a markup, corresponding to type predicate ‘markup?’;
> • a list of markups, corresponding to type predicate
> ‘markup-list?’;
> • any other scheme object, corresponding to type predicates such
> as ‘list?’, ‘number?’, ‘boolean?’, etc.
>
> You use a predicate other than markup? or markup-list?, so this
> counts as any other scheme object.
OK.
> The real question is what you actually are trying to achieve here.
I want to write a user-friendly markup command that can accept either
a markup or a markup list as arguments. Example:
```
% \ornament <above-stack> <base> <below-stack>
\markup \ornament \number ♭
\musicglyph "scripts.turn"
\number ♮
\markup \ornament { \number ♭ \number ♭ }
\musicglyph "scripts.turn"
\number ♮
```
Werner
