e class="language-ocaml"><code>&lt;a href=&quot;https://kkeun.net&quot;&gt;kkeun.net&lt;/a&gt;</code></pre><p>Note that the link address must start with <code>https://</code> or <code>http://</code>.</p></header><div class="odoc-content"><div class="odoc-spec"><div class="spec value anchored" id="val-is_safe"><a href="#val-is_safe" class="anchor"></a><code><span><span class="keyword">val</span> is_safe : bool</span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-first_char