title: space between 3 columns with border in bootstrap
body: <p>I want some space between my columns but I am not getting it after adding border to them. How can I do it?    </p>
  
  <pre><code>&lt;div class="row"&gt;
    &lt;div class="col-md-4" style= "border:1px solid black"&gt;
            &lt;p&gt;Stuff that fills this column&lt;/p&gt;
       &lt;/div&gt;
       &lt;div class="col-md-4" style= "border:1px solid black"&gt;
            &lt;p&gt;Stuff that fills this column&lt;/p&gt;
       &lt;/div&gt;
       &lt;div class="col-md-4" style= "border:1px solid black"&gt;
            &lt;p&gt;Stuff that fills this column&lt;/p&gt;
       &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>