test(tests/lean/run): expand tree example
test(tests/lean/run): expand tree example

Kha/lean,soonhokong/lean,johoelzl/lean,htzh/lean,Kha/lean,digama0/lean,Kha/lean,dselsam/lean,fpvandoorn/lean,fgdorais/lean,fpvandoorn/lean2,htzh/lean,levnach/lean,levnach/lean,avigad/lean,rlewis1988/lean,sp3ctum/lean,sp3ctum/lean,leanprover-community/lean,soonhokong/lean-osx,rlewis1988/lean,rlewis1988/lean,digama0/lean,leanprover-community/lean,avigad/lean,fgdorais/lean,leanprover-community/lean,UlrikBuchholtz/lean,UlrikBuchholtz/lean,soonhokong/lean,soonhokong/lean-windows,fgdorais/lean,UlrikBuchholtz/lean,soonhokong/lean-osx,c-cube/lean,soonhokong/lean,leanprover-community/lean,rlewis1988/lean,leanprover/lean,fpvandoorn/lean,htzh/lean,leanprover-community/lean,dselsam/lean,fpvandoorn/lean,avigad/lean,rlewis1988/lean,eigengrau/lean,digama0/lean,c-cube/lean,fpvandoorn/lean2,johoelzl/lean,soonhokong/lean-windows,johoelzl/lean,javra/lean,sp3ctum/lean,levnach/lean,fgdorais/lean,digama0/lean,leodemoura/lean,soonhokong/lean-osx,soonhokong/lean-osx,Kha/lean,sp3ctum/lean,eigengrau/lean,c-cube/lean,fpvandoorn/lean,htzh/lean,eigengrau/lean,johoelzl/lean,leodemoura/lean,UlrikBuchholtz/lean,avigad/lean,soonhokong/lean-osx,htzh/lean,fgdorais/lean,leanprover/lean,digama0/lean,leodemoura/lean,soonhokong/lean,johoelzl/lean,fpvandoorn/lean2,Kha/lean,leodemoura/lean,soonhokong/lean-windows,levnach/lean,sp3ctum/lean,Kha/lean,dselsam/lean,eigengrau/lean,soonhokong/lean-windows,dselsam/lean,digama0/lean,avigad/lean,leanprover/lean,javra/lean,javra/lean,eigengrau/lean,fpvandoorn/lean2,leanprover/lean,leanprover/lean,leodemoura/lean,javra/lean,leanprover-community/lean,soonhokong/lean,c-cube/lean,fpvandoorn/lean2,avigad/lean,fpvandoorn/lean,javra/lean,UlrikBuchholtz/lean,rlewis1988/lean,levnach/lean,fgdorais/lean,soonhokong/lean-windows,dselsam/lean,johoelzl/lean,leanprover/lean,leodemoura/lean,fpvandoorn/lean,dselsam/lean,c-cube/lean