title: Bootstrap input-append does not work on fluid grid
body: <p>I am trying to use <code>input-append</code> for the search input inside fluid row but unfortunately it does not seem to work correctly as it does not scale to full width of container.</p>
  
  <p>Here is my example piece of code:</p>
  
  <pre><code>&lt;div class="container"&gt;
  &lt;div class="row-fluid"&gt;
  &lt;div class="span12"&gt;
  
  
      &lt;div class="input-append"&gt;
      &lt;input class="span12" id="appendedInputButton" type="text"&gt;
      &lt;button class="btn" type="button"&gt;Go!&lt;/button&gt;
      &lt;/div&gt;
  
  &lt;/div&gt;
  &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>But the input does not scale full width of <code>span12</code>. Does anyone know why this is happening or what am I missing?</p>