chat-client/node_modules/showdown/test/features/rawHeaderId/with-prefixHeaderId.html

<h1 id="/prefix/some-header">some header</h1>
<h1 id="/prefix/another-!-#$%&/()=?»@£§{[]}«--header">another !"#$%&amp;/()=?»@£§{[]}«' header</h1>