A Tunisian court on Thursday confirmed an imprisonment sentence earlier handed down to a presidential contender ahead of elections scheduled for Sunday in the North African country. The appeals court in the city of Jendouba in western Tunisia had upheld the 20-month jail sentence against detained presidential candidate Ayachi Zammel, his lawyer said. The ruling can be appealed and will not affect Zammel’s candidacy, his lawyer said. Last month, a lower court issued the sentence against Zammel, a businessman and the head of the liberal Azimoun party, on charges of falsifying electoral endorseme…