fix(frontends/lean): coercion affects other modules
fix(frontends/lean): coercion affects other modules

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