title: Nunjucks nl2br does not exist?
body: <p>I need a filter like the Jinja "nl2br", but in the Nunjucks.
  In the documentation are a mention (<a href="https://mozilla.github.io/nunjucks/templating.html" rel="noreferrer">https://mozilla.github.io/nunjucks/templating.html</a>), but I searched it in the nunjucks code (<a href="https://github.com/mozilla/nunjucks/blob/master/src/filters.js" rel="noreferrer">https://github.com/mozilla/nunjucks/blob/master/src/filters.js</a>) and it does not exist.</p>
  
  <p>Somebody knows how to solve it with a equivalent filter or another solution? Or I need to create the filter?</p>