feat(debug): add assert_ne (not equal) macro
feat(debug): add assert_ne (not equal) macro

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

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