fix(util/object_serializer): do not compare chars
fix(util/object_serializer): do not compare chars

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