title: How can I apply styles to multiple classes at once?
body: <p>I want two classes with different names to have the same property in CSS. I don't want to repeat the code.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.abc {
     margin-left:20px;
  }  
  .xyz {
     margin-left:20px;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;a class="abc"&gt;Lorem&lt;/a&gt;
  &lt;a class="xyz"&gt;Ipsum&lt;/a&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Since both classes are doing the same thing, I should be able to merge it into one. How can I do that?</p>