Expected behavior

I had a WP website that was running perfectly on 7.1 and when moved to 7.4 a lot of whitespaces in twig templates started to disappear and break HTML everywhere around the website.

After some investigation, I found that TWIG has an issue with PHP 7.4 concerning whitespaces that got fixed with:
twigphp/Twig@1fb0f97 in 1.41.0 (2019-05-14)

Actual behavior

I expect whitespaces in twig templates to print as whitespaces in rendered HTML.

Steps to reproduce behavior

As

<header class="header {% do action('header_class') %}"></header>

Should render to:

<header class="header fixed"></header>

Instead, it is rendered as:

<header class="headerfixed"></header>

What version of WordPress, PHP and Timber are you using?

WordPress 5.2.3, PHP 7.4, Timber 1.0.5

How did you install Timber? (for example, from GitHub, Composer/Packagist, WP.org?)

Composer