What is the purpose of the loop in the main layout?

[o-t-w]

main.html has the following code:

 <div class="hidden">
      {{{ page.preheader }}}
      <each loop="item in Array.from(Array(150))">&#8199;&#65279;&#847; </each>
    </div>

In the production build output file I can see that it produces the following markup:

<div style="display: none">
    👀 Lorem, ipsum, and much dolor in this week's edition.
    &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847; &#8199;&#65279;&#847;
  </div>

What is the purpose of this code?

[husseinalhammad]

This is known as the preheader or preview text hack:

https://www.litmus.com/blog/the-little-known-preview-text-hack-you-may-want-to-use-in-every-email/

https://parcel.io/blog/preheader-spacing