Hi
Actually, I'd start by deprecating Show, because for machine readability it's not efficient and for human readability it's too simplistic.
When I show values there are 3 categories they fall into: 1) Output in a way for debugging - the current deriving Show gives me this, but its a pain I have to add deriving Show everywhere just to get debugging - I'd rename it Raw, and have everything derive Raw automatically and without comment. 2) Ouputting simple things. If I have a list of things, a pretty printing combinator is overkill - and whats more I don't care if the lines wrap around. I'd much rather have a nice simple "make this a string". The current Show solves this perfectly. 3) Pretty printing. I have an Output class for this (since i like to use the deriving Show for debugging). Show is good at what it does, for use case number 2. I use interact (intercalate as it is now) and intersperse lots, in both variations. One is good, both are better! (Have they been committed now? I thought I saw that go through...) Thanks Neil