Helen,
On the
Ad-hoc contributed reports page, which we all know has grown way too long, the upgrade has two problems with code formatting.
First, it ignores the tags as a block of text, instead it takes the carriage returns inside the code as markers of some sort and breaks the code up into several parts. That's not a good description I am afraid, but if you look at the attached screenshot, where there should just be one continuous block of code.
On the other hand,the upgrade has in other places, stripped out the end of line carriage returns in the code so that the whoe query now runs on together into one barely readable stream. In the source edit mode, the text is still formatted correctly, but when presented on the page, it loses the formatting and then just runs it altogether into one long line. Example in the second screenshot with an upper view of the edit source page and the lower view of the result.
So, basically, the formatting makes it very difficult to read anything on that page at the moment. I'm not at all sure how to fix these.