code: def _GenerateStatsTable(self, feed_merger):
      
      rows = []
      rows.append('<tr><th class="header"/><th class="header">Merged</th>'
                  '<th class="header">Copied from old feed</th>'
                  '<th class="header">Copied from new feed</th></tr>')
      for merger in feed_merger.GetMergerList():
        stats = merger.GetMergeStats()
        if stats is None:
          continue
        merged, not_merged_a, not_merged_b = stats
        rows.append('<tr><th class="header">%s</th>'
                    '<td class="header">%d</td>'
                    '<td class="header">%d</td>'
                    '<td class="header">%d</td></tr>' %
                    (merger.DATASET_NAME, merged, not_merged_a, not_merged_b))
      return '<table>%s</table>' % '\n'.join(rows)
docs: Generate an HTML table of merge statistics.
  
      Args:
        feed_merger: The FeedMerger instance.
  
      Returns:
        The generated HTML as a string.