Data.Map, Data.IntMap documentation (1611)

[Andriy Palamarchuk]

Thanks everybody for the corrections and suggestions.
Sorry it took this long to respond.


This is the final submission. Please commit the patch.


Log comment:
Improved, fixed documentation for Data.Map,
Data.IntMap. Added examples.

Changes since the previous submission:
* Moved time complexity Big-O values back to the
beginning of function descriptions.
* Converted examples from interpreter session-like
format to more compact equation-like format.
* As per
http://www.haskell.org/pipermail/libraries/2007-March/007304.html
added following information to the description of
updateLookupWithKey:

The function returns changed value, if it is updated.
Returns the original key value if the map entry is
deleted.

* Made corresponding changes for
Data.IntMap.updateLookupWithKey. Mentioned that it
differs from the Data.Map version.

Ticket:
http://hackage.haskell.org/trac/ghc/ticket/1611

Andriy


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