fix #2716, incorrect required markup for navbar search form

docs/components.html

@@ -1055,7 +1055,7 @@
   <input type="text" class="span2">
 </form>
 </pre>
-      <p>For a more customized search form, add the <code>.navbar-search</code> class to receive specialized styles in the navbar.</p>
+      <p>For a more customized search form, add <code>.navbar-search</code> to the <code>form</code> and <code>.search-query</code> to the input for specialized styles in the navbar.</p>
 <pre class="prettyprint linenums">
 &lt;form class="navbar-search pull-left"&gt;
   &lt;input type="text" class="search-query" placeholder="Search"&gt;

docs/templates/pages/components.mustache

@@ -979,7 +979,7 @@
   <input type="text" class="span2">
 </form>
 </pre>
-      <p>{{_i}}For a more customized search form, add the <code>.navbar-search</code> class to receive specialized styles in the navbar.{{/i}}</p>
+      <p>{{_i}}For a more customized search form, add <code>.navbar-search</code> to the <code>form</code> and <code>.search-query</code> to the input for specialized styles in the navbar.{{/i}}</p>
 <pre class="prettyprint linenums">
 &lt;form class="navbar-search pull-left"&gt;
   &lt;input type="text" class="search-query" placeholder="{{_i}}Search{{/i}}"&gt;