pandoc-3.9: test/command/9716.md

```
% pandoc -f markdown+alerts -t native
> [!TIP]
> A suggestion.
^D
[ Div
    ( "" , [ "tip" ] , [] )
    [ Div ( "" , [ "title" ] , [] ) [ Para [ Str "Tip" ] ]
    , Para [ Str "A" , Space , Str "suggestion." ]
    ]
]

```