[project @ 2004-10-11 16:16:20 by simonpj]

[project @ 2004-10-11 16:16:20 by simonpj]
---------------------------------
	Add lists to valid derivable methods
	---------------------------------

	(It'd be nice to merge this into the stable
	branch. It is an increase in functionality, but
	it's quite separate from everything else.)

Lists are useful in derivable type classes.  E.g. methods like

	class Shrinkable a where
	  op :: a -> [a]

This commit adds them, to join functions and tuples.