One enacted for the purpose of removing doubts or putting an end to conflicting decisions in regard to what the law is in relation to a particular matter. It may either be expressive of the common law, (1 Bl. Comm. 86; Gray v. Bennett, 3 Mete. [Mass.] 527:) or may declare what shall be taken to be the true meaning and intention of a previous statute, though in the latter case such enactments are more commonly called “expository statutes.”