title: It this the correct way of extending eslint rules?
body: <p>In my <code>eslint</code> config (<code>YAML</code> format), I'm extending 3 different configurations:</p>
  
  <pre><code>extends:
  - airbnb-base
  - plugin:angular/johnpapa
  - ionic
  </code></pre>
  
  <p>My questions are as follows:</p>
  
  <ul>
  <li>Is this the correct format in <code>YAML</code>?</li>
  <li>Some of these extensions have overlapping rules (or multiple of them extend <code>eslint:recommended</code>): will I get the same error multiple times if the error is related to one of these "shared" rules?</li>
  </ul>