Bundle UI codeblocks are not rendering links

Some commit changed the UI bundle and it's not rendering links inside code blocks anymore. For instance: ```adoc [source,cpp,subs="verbatim,replacements,macros,-callouts"] ---- class segments&lowbar;encoded&lowbar;ref : public xref:boost/urls/segments_encoded_base.adoc[segments&lowbar;encoded&lowbar;base] ---- ``` used to render a link for segments_encoded_base (and the default UI bundle still does), and now it just renders a literal `segments_encoded_base`. Our UI bundle: ```html <code class="language-cpp hljs" data-lang="cpp" data-highlighted="yes"><span class="hljs-keyword">class</span> <span class="hljs-title class_">segments_encoded_ref</span> : <span class="hljs-keyword">public</span> segments_encoded_base</code> ``` The default UI bundle: ```html <code class="language-cpp hljs" data-lang="cpp"><span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">segments_encoded_ref</span> :</span> <span class="hljs-keyword">public</span> <a href="segments_encoded_base.html" class="xref page">segments_encoded_base</a></code> ``` This is probably related to another bug where a commit changing our UI bundle stopped replacing escaped characters inside code blocks.