title: jump back to the first non-whitespace character in vim
body: <p>I have a file like the following (with end-of-line shown as $)</p>
  
  <pre><code>233            $
  </code></pre>
  
  <p>Suppose my cursor is currently at one of the spaces between <code>3</code> and $. I want to be able to jump back to 3. Any available keybinding for that?</p>
  
  <p>Thanks!</p>