title: Bad space between li and border
body: <p>Why is there a space between <code>li</code> elements and <code>border</code> in <code>header</code>? There should be no space between li elements and border. </p>
  
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  <p>PS: <code>li</code> elements have<code>float:left</code> and <code>overflow:auto</code></p>