anchor.diff:                        label Vehicle
                         ul.filter-options
                           li
  -                          a(href='#', data-filter='vehicle', data-value='no') No
  +                          a(href='#', data-filter='vehicle', data-value='none') none
                           li
                             a(href='#', data-filter='vehicle', data-value='motorcycle') motocycle
                           li
  
positive.code:                       label Hit With
                        ul.filter-options
                          li
                            a(href='#', data-filter='hit', data-value='no') No
                          li
                            a(href='#', data-filter='hit', data-value='motorcycle') motocycle
                          li
  
negative.code:         .attr('fill', color)
          .attr('r', function(d) { return 1; });
      }
      return true;
    }
  
  