Broken link (Simple example)

[jcmonnin]

<li class="indent"><a target="demo" class="code" href='core/demo/example.html</a>'>https://fin-hypergrid.github.io/core/demo/example.html</a><br> <em>Simple example</em></li>

should be

<li class="indent"><a target="demo" class="code" href='core/demo/example.html'>https://fin-hypergrid.github.io/core/demo/example.html</a><br> <em>Simple example</em></li>