anchor.diff:            pie_chart @documents.where.not(cached_word_count: [0, nil]).order('cached_word_count DESC').limit(10).pluck(:title, :cached_word_count),
               suffix: ' words',
               legend: 'bottom',
  -            donut: 'true'
  +            donut: 'true',
  +            download: true
           %>
         </div>
       </div>
  
positive.code:           title: "All time",
            ytitle: "minutes",
            colors: [Document.color],
            suffix: " minutes"
          %>
          <br />
          <div class="center">
  
negative.code:           bar_chart current_user.documents.joins(:document_revisions)
                .group('document_revisions.document_id')
                .pluck('documents.title, count(document_revisions.document_id)'),
              suffix: ' revisions',
              download: true
          %>
        </div>
      </div>
  