[Haskell] readList oddity

[Johannes Waldmann]

> Because of that, calling error in one of your read functions seems a bad
> idea. In fact, returning an empty list is the right way to return an error
> in the prelude's parsing framework. If you want something different (e.g.,
> because you want better error messages) you should not be using the 
> prelude's read function. 

indeed I use Parsec in this project, because of better error reporting,
and because it evaluates more eager. But in this case an external 
library (Wash) was expecting that I provide a Read instance.
I now think I should have overridden the default definition of readList.
http://141.57.11.163/cgi-bin/cvsweb/lib/Autolib/Reader/Link.hs?rev=1.2
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