title: How to reset or reinstall emacs custom themes after erasing or overwriting a theme
body: <p>I am new to Emacs, (using emacs25), and I went to custom themes. I believe I accidentally overwrote the details of a theme called Misterioso.</p>
  
  <p>I want the default misterioso customization.</p>
  
  <p>I have tried to</p>
  
  <pre><code>$ sudo apt-get purge emacs25
  </code></pre>
  
  <p>and </p>
  
  <pre><code>$ sudo apt-get autoremove emacs25
  </code></pre>
  
  <p>then I reinstalled emacs25.</p>
  
  <p>The custom theme misterioso is still destroyed, it reads:</p>
  
  <p><code>misterioso -- Created 2018-10-15.</code></p>
  
  <p>How do I actually reset to get this theme back?</p>