BR tags are added to HTML widget code

[n3wjack]

Steps to reproduce:

1. Add an HTML widget to a footer block containing a script block with multiple lines of JS code.
2. Save.
3. Refresh the page (F5)

Result:

The JS code now contains <br/> statements, breaking the code.
When you save again, the JS will fail in the browser.

Expected:

No extra HTML tags are added to an HTML widget.

Example HTML widget content:

<script src='https://storage.ko-fi.com/cdn/scripts/overlay-widget.js'></script>
<script>
  kofiWidgetOverlay.draw('n3wjack', {
    'type': 'floating-chat',
    'floating-chat.donateButton.text': 'Support Me',
    'floating-chat.donateButton.background-color': '#323842',
    'floating-chat.donateButton.text-color': '#fff'
  });
</script>

Example of resulting HTML code with extra HTML tags:

<p><script src="https://storage.ko-fi.com/cdn/scripts/overlay-widget.js"></script><br>
<script><br />
  if (document.body.classList.contains('post-template-default')) {<br />
  kofiWidgetOverlay.draw('n3wjack', {<br />
    'type': 'floating-chat',<br />
    'floating-chat.donateButton.text': '',<br />
    'floating-chat.donateButton.background-color': '#323842',<br />
    'floating-chat.donateButton.text-color': '#fff'<br />
  });<br />
}<br />
</script></p>

[costdev]

Hi @n3wjack, thanks for opening this ticket.

This has been reported upstream at the Gutenberg repo. See ​GB 33936. Let's continue the discussion there.