title: Vim comma command keys
body: <p>I downloaded this vimrc file.
  It contains entries for mapping comma seperated keys to certain commands.
  ie:</p>
  
  <pre><code>map ,e :e &lt;C-R&gt;=expand("%:p:h") . "/" &lt;CR&gt;
  </code></pre>
  
  <p>What i can't figure out is how to run these commands in Vim.</p>
  
  <p>How to i run ",e"?</p>