documentation suggestion

Would it be possible to add an example in the documentation of how to write a function pPrintList for nested lists? i.e.
pPrintList [[1..5],[6..10]] would output something like
[
[1,2,3,4,5]
[6,7,8,9,10]
]

i.e. something similar to the output of (putStrLn . unlines . map show) [[1,2,3,4,5],[6,7,8,9,10]]
[1,2,3,4,5]
[6,7,8,9,10]
except with the enclosing brackets and indentation. It would be interesting to have one where the output has commas and another has spaces instead of commas.

This would be analogous to Wadler's example of how to prettyPrint a tree in his paper "A prettier printer". It would also be good to add an example of how to prettyPrint a tree using this package.

Thanks