NAIROBI: The Kenyan shilling weakened on Monday as importers bought dollars with an eye on a court ruling due this week on a challenge to the presidential election, while shares rose for a second session.At the 1300 GMT market close, commercial banks quoted the shilling at 85.90/86.10 to the dollar, 0.2 percent weaker than Friday's close of 85.70/90."We're looking at some month-end dollar demand with a focus on the end-of-the-week court ruling," said Dickson Magecha, a trader at Standard Chartered Bank, referring to a petition lodged by defeated presidential contender Raila Odinga.The shilling has been trading in a tight band of 85.00 to 86.00 against the dollar since Odinga challenged the result of the March 4 election at the Supreme Court. Uhuru Kenyatta, who faces of charges of crimes against humanity at the International Criminal Court, was declared winner in the poll.If the court rules in favour of Odinga and ...