AUR showed me a wrong description in PKGBUILD who contained this line:

pkgdesc="A free, fast and small automatic formatter for C, C++, C#, and Java source code."

Which resulted to this on the package page:

Description: "A free, fast and small automatic formatter for C, C++, C

Changing C# to C-Sharp fixed this wrong behaviour and made clear that even in escaped strings line comments will be removed. I don't think this is intentional and found the bug in /web/html/pkgsubmit.php#n136

$line = preg_replace('/\s*#.*/', '', $line);

Changing the regex to /#[^'"]+$/m should fix it in the most cases. A better way would be using multiple a bigger and more complex regex using multiple alternatives to differentiate comments in and outside of strings or don't use regex for it in the first place.

Greetings.