An Act amending Title 20 (Decedents, Estates and Fiduciaries) of the Pennsylvania Consolidated Statutes, in intestate succession, further providing for share of surviving spouse; in wills, further providing for modification by circumstances and for penalty clause for contest; in administration and personal representatives, providing for application to co-personal representatives; in estates, further providing for modification by divorce or pending divorce; and, in trusts, further providing for rules of construction - UTC 112 and providing for modification by circumstances and for penalty clause for contest.