merge (Rcov::FileStatistics)

    # File lib/rcov.rb, line 108
      def merge(lines, coverage, counts)
        coverage.each_with_index do |v, idx|
          case @coverage[idx]
          when :inferred
            @coverage[idx] = v || @coverage[idx]
          when false
            @coverage[idx] ||= v
          end
        end
        counts.each_with_index{|v, idx| @counts[idx] += v }
        precompute_coverage false
      end