This tests forward deleting in an empty table cell. The cursor shouldn't move.
| "
"
| <table>
|   border="1"
|   "
"
|   <tbody>
|     "
"
|     <tr>
|       <td>
|         "1"
|       <td>
|         "2"
|     "
"
|     <tr>
|       <td>
|         "3"
|       <td>
|         id="fourth"
|         <#selection-caret>
|         <br>
|     "
"
|   "
"
| "
"
