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While being done in the standard library, several big libraries alternative (Core, Batteries...) prefer wrapping everything in an `option` type instead of raising an exception. Wrapping in an option avoids forgetting about catching the exception.
Don't forget the wonderful "pourriel" mixing "poubelle" (trash can) and e-mail to designate spam, If only it would have crossed the ocean.
This can be an editor of choice for something like http://hackage.haskell.org/package/asciidiagram or http://ditaa.sourceforge.net/
Does any one know the name of the hex editor used in these slides, the one showing the PNG chunks and JPEG information?
The best way I know to do it for Haskell is to use haskellConceal ( http://www.vim.org/scripts/script.php?script_id=3200 ), it display unicode characters but left the underlying ASCII untouched.