easy-octaves snippet is broken

```
/home/uliska/software/lilypond/releases/2.19.60/usr/share/lilypond/current/scm/lily-library.scm:189:24: In expression (f m):
/home/uliska/software/lilypond/releases/2.19.60/usr/share/lilypond/current/scm/lily-library.scm:189:24: Wrong number of arguments to #<procedure #f (music parser)>
```