Spaces after a colon:
......

Term 1
  :    paragraph

Term 2
  :     code block

......

<dl data-sourcepos="1:1-5:18">
<dt data-sourcepos="1:1-1:6">Term 1</dt>
<dd data-sourcepos="2:8-3:0">paragraph</dd>
<dt data-sourcepos="4:1-4:6">Term 2</dt>
<dd data-sourcepos="4:1-5:18">
<pre><code data-sourcepos="5:9-5:18">code block
</code></pre>
</dd>
</dl>