feat(bin/ltags): resolve abbreviation('a') to definition
feat(bin/ltags): resolve abbreviation('a') to definition

Close #131

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