feat(list): also port part of list.comb
feat(list): also port part of list.comb

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