test(tests/lean/exp): add example for Steve
test(tests/lean/exp): add example for Steve

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

codyroux/lean0.1,htzh/lean,soonhokong/lean,soonhokong/travis_test,levnach/lean,soonhokong/lean-osx,johoelzl/lean,fpvandoorn/lean,fpvandoorn/lean,fgdorais/lean,fgdorais/lean,fpvandoorn/lean2,rlewis1988/lean,htzh/lean,soonhokong/lean,htzh/lean,dselsam/lean,avigad/lean,UlrikBuchholtz/lean,javra/lean,eigengrau/lean,fpvandoorn/lean2,leanprover-community/lean,digama0/lean,fpvandoorn/lean,fgdorais/lean,sp3ctum/lean,codyroux/lean0.1,htzh/lean,Kha/lean,Kha/lean,leanprover/lean,leanprover/lean,digama0/lean,fpvandoorn/lean2,leodemoura/lean,leodemoura/lean,rlewis1988/lean,avigad/lean,eigengrau/lean,dselsam/lean,dselsam/lean,dselsam/lean,eigengrau/lean,leanprover/lean,rlewis1988/lean,Kha/lean,digama0/lean,sp3ctum/lean,leodemoura/lean,c-cube/lean,fgdorais/lean,eigengrau/lean,javra/lean,leanprover/lean,fpvandoorn/lean,UlrikBuchholtz/lean,leodemoura/lean,soonhokong/lean,soonhokong/lean,soonhokong/lean-osx,levnach/lean,Kha/lean,soonhokong/lean-osx,leodemoura/lean,fpvandoorn/lean2,soonhokong/lean-windows,c-cube/lean,soonhokong/lean-osx,UlrikBuchholtz/lean,c-cube/lean,avigad/lean,soonhokong/lean-windows,soonhokong/travis_test,UlrikBuchholtz/lean,javra/lean,leanprover-community/lean,leodemoura/lean,javra/lean,leanprover-community/lean,codyroux/lean0.1,sp3ctum/lean,fpvandoorn/lean,johoelzl/lean,johoelzl/lean,soonhokong/lean-windows,avigad/lean,eigengrau/lean,avigad/lean,johoelzl/lean,c-cube/lean,digama0/lean,htzh/lean,c-cube/lean,digama0/lean,leanprover/lean,codyroux/lean0.1,levnach/lean,dselsam/lean,johoelzl/lean,fpvandoorn/lean2,levnach/lean,javra/lean,rlewis1988/lean,soonhokong/travis_test,levnach/lean,sp3ctum/lean,soonhokong/travis_test,Kha/lean,fgdorais/lean,sp3ctum/lean,soonhokong/lean-windows,fpvandoorn/lean,soonhokong/lean-osx,UlrikBuchholtz/lean,dselsam/lean,Kha/lean,digama0/lean,leanprover/lean,leanprover-community/lean,soonhokong/lean,johoelzl/lean,avigad/lean,rlewis1988/lean,leanprover-community/lean,soonhokong/lean-windows,rlewis1988/lean,fgdorais/lean,leanprover-community/lean