This test copies, deletes, and paste back <div id="test" class="editing"><p>foo</p><p>bar</p></div>
It then inserts the paragraph and pastes the contents again.
| "
"
| <div>
|   class="editing"
|   id="test"
|   <p>
|     <p>
|       "foo"
|     <p>
|       "bar"
|     <p>
|       <p>
|         "foo"
|       <p>
|         "bar<#selection-caret>"
| "
"