Line breaks/new lines entered in a textarea are stored in MySQL, but when you go back and edit it, the line breaks are gone and all text is on the same line.
The reason is that all new lines and line breaks are filtered out from the output, in public/index.php:
echo str_replace(["\n","\r","\t"], '', $application->handle()->getContent());
When I remove the str_replace part, line breaks in the textarea are shown as expected.
My question is: why is that str_replace there? Why does the output need to be on one line? I think line breaks can never be shown in a textarea as long as that str_replace is there, right? Or am I missing something?