Twig template rendering

[hoxhaj]

I am rendering a twig template and modifying the html. I can modify the html but it breaks the twig string.

After i load the .twig file this div:

<div {{ not variable_name ? 'class="class_name"' }} id="id_name">

turns to:

<div {{ not variable_name ? 'class="class_name" }} id="id_name">

'class="class_name"<=== the single quote after the double quotes is lost.

I wanted to know if there is an option to set for this purpose or this case is not handled.

Thanks!