diff-row.html

<tr ng-class="{unchanged: prev == next, warning: prev && next && prev != next}">
  <th ng-class="{danger: next == undefined, success: prev == undefined}">
    {{key}}
  </th>
  <td ng-class="{danger: next == undefined}">
    {{prev}}
  </td>
  <td ng-class="{success: prev == undefined}">
    {{next}}
  </td>
</tr>