# File lib/diff/lcs/change.rb, line 142
  def self.simplify(event)
    ea = event.to_a

    case ea[0]
    when '-'
      ea[2][1] = nil
    when '<'
      ea[0] = '-'
      ea[2][1] = nil
    when '+'
      ea[1][1] = nil
    when '>'
      ea[0] = '+'
      ea[1][1] = nil
    end

    Diff::LCS::ContextChange.from_a(ea)
  end