Pretty printing (was: Standard Library for text formatting?)

[Dr Mark H Phillips]

Hi again,

After doing some searching, it seems that "pretty printing" is
a prominant "Haskell way" of doing text output.  I still am
interested in finding a library of standard text formatting
(String formatting) functions, but it seems like it might
be worth my while investigating pretty printing.

So far there seem to be three candidate pretty printing 
libraries:

1. A library by Simon Peyton Jones

http://research.microsoft.com/~simonpj/downloads/pretty-printer/pretty.html

2. A library by the Software Technology Group

http://www.cs.uu.nl/groups/ST/Software/PP/

3. The following library

http://www.cs.uu.nl/~daan/pprint.html

(This one doesn't seem to be mentioned at haskell.org --- any 
reason why?)

Could anyone comment on the pros and cons of each of these 
libraries, plus any other libraries I've missed that are
worth of note?  It would be helpful to know what libraries
are worth investing my time finding out about.

(And of course, I'd still love to hear about simple string
formatting libraries.)

Cheers,

Mark.

-- 
Dr Mark H Phillips
Research Analyst (Mathematician)

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