fix(frontends/lean/pp): pretty print pattern hints
fix(frontends/lean/pp): pretty print pattern hints

Kha/lean,dselsam/lean,digama0/lean,rlewis1988/lean,fgdorais/lean,fpvandoorn/lean,leodemoura/lean,dselsam/lean,leodemoura/lean,fgdorais/lean,digama0/lean,leanprover-community/lean,fpvandoorn/lean,Kha/lean,rlewis1988/lean,avigad/lean,fpvandoorn/lean,leanprover-community/lean,dselsam/lean,fgdorais/lean,avigad/lean,fpvandoorn/lean,johoelzl/lean,digama0/lean,Kha/lean,leanprover/lean,leodemoura/lean,rlewis1988/lean,avigad/lean,leanprover-community/lean,avigad/lean,fgdorais/lean,digama0/lean,rlewis1988/lean,johoelzl/lean,fgdorais/lean,Kha/lean,Kha/lean,rlewis1988/lean,leanprover-community/lean,johoelzl/lean,fgdorais/lean,leodemoura/lean,johoelzl/lean,digama0/lean,leodemoura/lean,digama0/lean,leanprover/lean,rlewis1988/lean,leanprover/lean,leanprover/lean,Kha/lean,leanprover/lean,leanprover-community/lean,johoelzl/lean,leanprover-community/lean,dselsam/lean,avigad/lean,johoelzl/lean,fpvandoorn/lean,fpvandoorn/lean,avigad/lean,dselsam/lean,leanprover/lean,dselsam/lean,leodemoura/lean