Iran’s supreme leader, Ayatollah Ali Khamenei, sought to assuage Iranians’ concerns on Sunday after an increase in fuel prices ignited deadly unrest as the government comes under pressure at home and in pockets of the region. Violent protests broke out over the weekend in several cities after the Iranian government said Friday it would cut gasoline subsidies. Those subsidies are a sensitive issue for Iranians, who are feeling squeezed by U.S. sanctions imposed on Iran’s economy. …