refactor(emacs/lean-type): clean up eldoc-function and fill-placeholder
refactor(emacs/lean-type): clean up eldoc-function and fill-placeholder

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