fix typo

docs/index.html

@@ -1119,7 +1119,7 @@ Lorem ipsum dolar sit amet illo error <a href="#" title="below">ipsum</a> verita
   <div class="row">
     <div class="span4 columns">
       <h2>Popovers</h2>
-      <p>Use popovers to provide subtextual information to a page without effecting layout.</p>
+      <p>Use popovers to provide subtextual information to a page without affecting layout.</p>
     </div>
     <div class="span12 columns">
       <div class="well popover-well">