White space in empty lines is not highlighted - (bug/feature request)

When i make diff between:
OLD

<pre>
aaa

bbb
</pre>

NEW

<pre>
aaa
 
bbb
</pre>


there is a space in 'NEW' version in empty line.
Those space is not highlighted, it could be inside

> <pre>&lt;ins&gt; &lt;/ins&gt;</pre>

and additionally css:

<pre>
.Differences ins, .Differences del {
    text-decoration: none;
    white-space: pre-wrap;
}
</pre>
