fix(library/tactic/simp_lemmas): report invalid simplification lemmas also in add()
fix(library/tactic/simp_lemmas): report invalid simplification lemmas also in add()

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