fix(library/vm/vm_io): capture put_str/put_nat output in server mode
fix(library/vm/vm_io): capture put_str/put_nat output in server mode

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