anchor.diff:              td= level.get('practiceThresholdMinutes')
               td= level.get('shareable')
               td= level.get('primerLanguage')
  +            td
  +              for concept in level.get('concepts') || []
  +                if !conceptsSeen[concept]
  +                  - conceptsSeen[concept] = true;
  +                  span= concept + ' '
  
positive.code:         tr
            td= levelsTotal
            td All
      each course in view.courses.models
        if course.get('releasePhase') !== 'released'
          - continue;
  
negative.code:           th Practice Threshold (m)
            th Shareable
            th Primer
            th New Concepts
          each level, levelIndex in levels
            - var levelNumber = campaign.getLevelNumber(level.get('original'), levelIndex + 1)
            tr
  