fix(frontends/lean/definition_cmds): fix trace messages in proofs
fix(frontends/lean/definition_cmds): fix trace messages in proofs

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