Fix HTML

Author: afs

spec/index.html

@@ -6482,7 +6482,7 @@ <h5>DATATYPE</h5>
             </div>
           </section>
           <section id="func-iri">
-            <span id=""func-uri"></span>
+            <span id="func-uri"></span>
             <h5>IRI</h5>
             <pre class="prototype nohighlight">
               <span class="return">iri</span>  <span class="operator">IRI</span>(<span class="type">xsd:string</span>)