PARIS (Reuters) - French car hire firm Europcar , hit by the coronavirus outbreak, is in talks with banks on a 223 million euro liquidity line guaranteed by the French government, a source familiar with the matter said.Europcar's shares rose 13% on Tuesday after Le Monde newspaper first reported that talks about the credit line were close to a conclusion.The company's shares are down by 65% this year as a Brexit-related drop in demand, declining business-to-business rental volumes and a..