docs: def gradings(gradingScheme):
      ''' Determine the list of gradings in this scheme as rendered string.
          TODO: Use nice little icons instead of (p) / (f) marking.
      '''
      result = []
      for grading in gradingScheme.gradings.all():
          if grading.means_passed:
              result.append(str(grading) + " (pass)")
          else:
              result.append(str(grading) + " (fail)")
      return '  -  '.join(result)