6 border:
1px solid black;
11 <p>This is a test for line layout to properly handle collapsing whitespace interspersed with inline isolated content.
</p>
14 <span>456</span> 789</p>
15 <p>123 <span>456</span> 789</p>
32 <span> </span> 789</p>
35 789 <span> 10 11 12 </span> 13 14 15 </p>
37 <span> 4 <span> 5 6 7 </span> 89 </span>
38 10 11 12 <span> 13 14 15 </p>