Finance experts predict Tuesday’s spring economic update will contain a number of new economic measures aimed at tackling affordability and the wider economic challenges of the country, and they expect the update will show a smaller-than-forecasted deficit.”That’ll be the headline number that will likely get a lot of attention,” said Sahir Khan, executive vice president of the University of Ottawa’s Institute of Fiscal Studies and Democracy. Khan said government revenues are likely up thanks to an economy that is proving more resilient than expected as well as surging oil prices. Also, there are probably some delays in getting some promised money…