Re: \balloonText doesn't work with drum notation

> This should make a balloon text, [...]

There is no bug.  As the documentation says, `\balloonText` only works
within chords.  If you replace

```
hh1-\balloonText #'(1 . 1) \markup { "I'm a note head" }
```

with a single-note chord

```
<hh-\balloonText #'(1 . 1) \markup { "I'm a note head" } >1
```

you get the desired result.


    Werner