Unionized machinists at Boeing voted Monday to accept a contract offer and end their strike after more than seven weeks, clearing the way for the aerospace giant to resume production of its bestselling airliner and generate much-needed cash. Leaders of the International Association of Machinists and Aerospace Workers district in Seattle said 59% of members who cast ballots agreed to approve the company’s fourth formal offer and the third put to a vote. The deal includes pay raises of 38% over fo