DevOps, CI/CD and Automation

I try to upgrade our Middleware from 10.1.2 to 11.1.1.2 starting with Reports. It looks like I got fonts and charset right and reports from our new server look like the old server reports. There is one problem still left - in places where our pl/sql code has chr(13)||chr(10) the old server shows new line, but the new server shows a small square and newline. Looks like it does not understand chr(13) correctly. I would prefer not to change the (working) pl/sql code, because there are lots of reports that use chr(13)||chr(10) for newline and there might be carriage returns in our data too.
So any suggestions, what I might have overlooked, are welcome.