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5.3 Format

This groups a few items which had no obvious home and which change the format of objects.

`Duplicate`
  Copy an object, stripping off any derived classes. For images, this really takes a copy of the underlying object (using `im_copy()`).

`List to Group`
  Changes lists (see `Math` / `List`) into Groups (see `Edit` / `Group`) and back. A list os an ordered collection of objects. A group is a list that `nip2` will automatically iterate over.

`Break Up Object`
  This tries to take an object apart. So a multi-band image becomes a list of 1-band images. A matrix becomes a list of vectors, and so on.