By Uditha Jayasinghe COLOMBO (Reuters) -Sri Lanka’s government imposed a weekend curfew on Saturday, even as hundreds of lawyers urged President Gotabaya Rajapaksa to revoke a state of emergency introduced following unrest over fuel and other shortages in a deep economic crisis. The government’s information department said a countrywide curfew would run from 6 p.m. (1230 GMT) on Saturday to 6 a.m. (0030 GMT) on Monday. Rajapaksa introduced a state of emergency on Friday, raising fears of a crackdown on protests. Emergency powers in the past have allowed the military to arrest and detain suspec…