Why some code statements appears one-symbol-per-row in xcode?

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.

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