title: Prevent Vim from indenting line when typing a colon (:) in Python
body: <p>Whenever I append a <code>:</code> character in Vim in Python mode, it either:</p>
  
  <ul>
  <li>indents the line</li>
  <li>dedents the line</li>
  <li>does nothing</li>
  </ul>
  
  <p>What is it even trying to do, and how do I get rid of this behavior?</p>