The provisions of this act, so far as they are the same as those of existing laws, shall be construed as a continuation of such laws and not as new enactments. The repeal by this act of any provision of law shall not revive any law heretofore repealed or superseded, nor shall this act affect any act done, liability incurred, or any right accrued and established, or any suit or prosecution, civil or criminal, pending or to be instituted to enforce any right or penalty or punish any offense under the authority of the repealed laws. Any person who, at the time when said repeal takes effect, holds office under any of the laws repealed shall continue to hold such office according to the tenure thereof.