ode class="xref py py-func docutils literal"><span class="pre">highlight_phrase()</span></code> has been changed from <code class="docutils literal"><span class="pre">&lt;strong&gt;</span></code> to the new HTML5
tag <code class="docutils literal"><span class="pre">&lt;mark&gt;</span></code>.</p>
<p>Unless you’ve used your own highlighting tags, this might cause trouble
for your visitors who use older web browsers such as Internet Explorer 8.
We therefore suggest that you add the following code to your CS