From: Bob Ippolito

I don't know why I ended up looking at an old version of Data.Text but the copy function has been around for a year, since 0.11.3.0. http://hackage.haskell.org/package/text-1.1.1.2/docs/Data-Text.html#copy ? you'll want to use it for this use case.

Great, thanks, that solved the problem! Best, Jan