[fpc-pascal] FCL documentation AVL_tree

[Marco van de Voort]

In our previous episode, Michael Van Canneyt said:
> > Is there already a documentation/example for the AVL_tree unit of the
> > FCL?
> > If not, I would like to provide one.
> 
> The documentation is there, the example not (yet).

Huh? I commit one last week (or the week before that?!)