title: Vertical spacing between DIVs
body: <p>I have some extra vertical spacing between the rows of my 3x3 grid of DIVs and I don't know why.  Can somebody help me out here:</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.tinybox {
    width: 5px;
    height: 5px;
    border: solid 1px #999;
    padding: 0;
    margin: 1px;
    float: left;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;br style="clear:both" /&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;br style="clear:both" /&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;div class="tinybox"&gt;&lt;/div&gt;
  &lt;br style="clear:both" /&gt;</code></pre>
  </div>
  </div>
  </p>
  <p>I have tried line-height, but that does nothing.</p>