Update.

manual/howto/file-operations.html

@@ -40,6 +40,8 @@
                     <span class="section-title">API Reference</span>
                     <ul>
                         <li><a href="../api/index.html">Overview</a></li>
+                        <li><a href="../api/string.html">String</a></li>
+                        <li><a href="../api/number.html">Num</a></li>
                         <li><a href="../api/http.html">http</a></li>
                         <li><a href="../api/websocket.html">websocket</a></li>
                         <li><a href="../api/tls.html">tls</a></li>
@@ -58,6 +60,7 @@
                         <li><a href="../api/datetime.html">datetime</a></li>
                         <li><a href="../api/timer.html">timer</a></li>
                         <li><a href="../api/io.html">io</a></li>
+                        <li><a href="../api/pathlib.html">pathlib</a></li>
                         <li><a href="../api/scheduler.html">scheduler</a></li>
                         <li><a href="../api/math.html">math</a></li>
                     </ul>
@@ -391,7 +394,7 @@ System.print("Total size: %(size) bytes")</code></pre>
 
                 <div class="admonition tip">
                     <div class="admonition-title">See Also</div>
-                    <p>For full API documentation, see the <a href="../api/io.html">IO module reference</a>.</p>
+                    <p>For full API documentation, see the <a href="../api/io.html">IO module reference</a>. For object-oriented path manipulation with glob, walk, and tree operations, see the <a href="../api/pathlib.html">pathlib module reference</a>.</p>
                 </div>
             </article>