fix(src/emacs/lean-syntax.el): highlight identifiers after 'proposition' and 'corollary'
fix(src/emacs/lean-syntax.el): highlight identifiers after 'proposition' and 'corollary'

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