President Muhammadu Buhari said Nigeria will soon sign up to an African continental free trade agreement. Buhari made the comment while speaking at a press conference during a visit by South Africa’s President Cyril Ramaphosa. Nigeria's President Buhari says will soon sign African continental free trade agreement https://t.co/fqKhClv1bh pic.twitter.com/ucYJVeiRsE — Reuters Africa (@ReutersAfrica) July 14,…