title: How to make Prettier to ignore a block of code?
body: <p>Say we have a line of code:</p>
  <pre class="lang-js prettyprint-override"><code>const a = 'a'; const b = 'b';
  </code></pre>
  <p>and we wouldn't want it to be formatter by Prettier.</p>
  <p>What I've tried so far:</p>
  <p>1)</p>
  <pre class="lang-js prettyprint-override"><code>// prettier-ignore
  const a = 'a'; const b = 'b';
  </code></pre>
  <ol start="2">
  <li></li>
  </ol>
  <pre class="lang-js prettyprint-override"><code>// prettier-ignore-start
  const a = 'a'; const b = 'b';
  // prettier-ignore-end
  </code></pre>
  <p>In both cases it gets transformed into:</p>
  <pre class="lang-js prettyprint-override"><code>const a = 'a';
  const b = 'b';
  </code></pre>
  <p>So how to ignore a block of code?</p>