feat(library/unifier): add new rule for constraints of the form (pr ...) =?= t, where (pr ...) is a "stuck" projection application
feat(library/unifier): add new rule for constraints of the form (pr ...) =?= t, where (pr ...) is a "stuck" projection application

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