StringInterpolation not works well with Seq

[clouds56]

import play.twirl.api.StringInterpolation
val test_seq = Seq(10,20,30)
def test_div(i: Int) = html"<div>$i</div>"
html"""
<ul>
  <li>${test_div(-1)}</li>
  ${test_seq.map(i => <li>{test_div(i)}</li>)}
</ul>
"""

outputs

<ul>
  <li><div>-1</div></li>
  <li>&lt;div&gt;10&lt;/div&gt;</li><li>&lt;div&gt;20&lt;/div&gt;</li><li>&lt;div&gt;30&lt;/div&gt;</li>
</ul>

While I expects

<ul>
  <li><div>-1</div></li>
  <li><div>10</div></li><li><div>20</div></li><li><div>30</div></li>
</ul>

I know I can do this using

val test_seq = Seq(10,20,30)
def test_div(i: Int) = html"<div>$i</div>"
html"""
<ul>
  <li>${test_div(-1)}</li>
  ${test_seq.map(i => html"<li>${test_div(i)}</li>")}
</ul>
"""

but I hope we could have it done without nested quoting