Update index.html

index.html

@@ -13173,7 +13173,7 @@ <h1><dfn class="export">Accessibility Tree</dfn></h1>
 	  <h2>Excluding Elements from the Accessibility Tree</h2>
 	  <p>The following [=elements=] are not exposed via the <a>accessibility <abbr title="Application Programing Interfaces">API</abbr></a> and user agents MUST NOT include them in the <a class="termref">accessibility tree</a>:</p>
 	  <ul>
-	    <li>Elements, including their descendent elements, that have host language semantics specifying that the element is not displayed or is meant to be treated as inert. For insance, elements with CSS <code>display:none</code>, <code>visibility:hidden</code>, the HTML <code>hidden</code> attribute in its default state, or HTML's <code>inert</code> attribute.</li>
+	    <li>Elements, including their descendent elements, that have host language semantics specifying that the element is not displayed or is meant to be treated as inert. For instance, elements with CSS <code>display: none</code>, <code>visibility: hidden</code>, the HTML <code>hidden</code> attribute in its default state, or HTML's <code>inert</code> attribute.</li>
 	    <li>Elements with <rref>none</rref> or <rref>presentation</rref> as the first role in the role attribute. However, their exclusion is conditional. In addition, the element's descendants and text content are generally included. These exceptions and conditions are documented in the <a href="#presentation">presentation (role)</a> section.</li>
     </ul>
 	  <p>If not already excluded from the accessibility tree per the above rules, user agents SHOULD NOT include the following elements in the accessibility tree:</p>