Sometimes when I’m viewing existing code, some fragments appear very odd: one symbol per row with alignment to left. For example, I have opened some code of some framework and I saw that weird formatting in some fragments. I have checked that those lines do not contain tabs or spaces. So, what might be a cause? I would be cool to hear from you that you have experienced that too, so please mark a question or post to comments.
UPDATE: here’s the screen:
That looks like a bug that you need to report to Apple.