TYPO3 Core

Example.

Constant:

globals.analytics (
  <script>
  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');

  ga('create', 'someid', 'somedomain');
  ga('send', 'pageview');

  </script>
)

Setup:

page.headerData.1001 = {$globals.analytics}

Result:

Oops, an error occured!

:-(

TYPO3 generates:

page.headerData.1001.value = <sript>
page.headerData.m = s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
page.ga = ga('send', 'pageview'); </script> ... [CONTINUES WITH A GOOD DEAL OF THE PAGE OBJECT]

:-?

Putting the constant in a single line results in the correct rendering of the website.

:-)