grammar fix; indicate that img[src] shouldn't actually be empty

docs/_includes/components/navbar.html

@@ -145,7 +145,7 @@
 
 
   <h2 id="navbar-brand-image">Brand image</h2>
-  <p>Replace the navbar brand with your own image by swapping the text for an <code>&lt;img&gt;</code>. Since the <code>.navbar-brand</code> has it's own padding and height, you may need to override some CSS depending on your image.</p>
+  <p>Replace the navbar brand with your own image by swapping the text for an <code>&lt;img&gt;</code>. Since the <code>.navbar-brand</code> has its own padding and height, you may need to override some CSS depending on your image.</p>
   <div class="bs-example">
     <nav class="navbar navbar-default" role="navigation">
       <div class="container-fluid">
@@ -162,7 +162,7 @@
   <div class="container-fluid">
     <div class="navbar-header">
       <a class="navbar-brand" href="#">
-        <img alt="Brand" src="">
+        <img alt="Brand" src="...">
       </a>
     </div>
   </div>