fix(library/tactic/revert_tactic): update output parameter
fix(library/tactic/revert_tactic): update output parameter

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