# File lib/simplecov/raw_coverage.rb, line 23
    def merge_file_coverage(file1, file2)
      return (file1 || file2).dup unless file1 && file2

      file1.map.with_index do |count1, index|
        count2 = file2[index]
        merge_line_coverage(count1, count2)
      end
    end