fix(util/exception): typo in error message
fix(util/exception): typo in error message

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