Hey, thanks for checking!
Yes, I grepped with the same results. The only place where the unwrap_factor property seems to be read is in preprocess.py. Problem is, I've added print statements around that and they don't get shown. That's why I'm asking if it's used in practice.
I'm going to do some more homework then, and see why it never gets to the print statements when converting from PDF. I just wanted to make sure unwrapping hadn't been disabled for some reason, and I was on a wild goose chase!
Miquel
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