By Duncan Miriri and Ayenat Mersie NAIROBI/ELDORET (Reuters) -Preliminary results from Kenya’s presidential election showed a tight race between the two main candidates vying to replace President Uhuru Kenyatta, with citizens praying an announcement of a winner would not unleash violence as in years past. The Tuesday election is an important test for stability in East Africa’s biggest economy, where two of the last three elections led to bloodshed and disputes over accusations of rigging. Tuesday’s polls were largely peaceful, although police said they were hunting a legislator who shot dead a…