[Haddock] [haddock] #261: Add type signatures to index overview

[haddock]

#261: Add type signatures to index overview
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Reporter:  quchen       |       Owner:     
    Type:  enhancement  |      Status:  new
Priority:  minor        |   Milestone:     
 Version:  2.11.0       |    Keywords:     
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 I've recently spent a lot of time in the GHC source and was clicking
 through names in the index just to find out the types for certain
 identifiers. Paired with the large amount of empty space the index table
 has, I thought it would be a good idea to fill that empty space with type
 signatures. The index would then have three columns: name, defining
 module, type. (For types/newtypes the actual definition could be filled in
 instead.) What do you think?

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Ticket URL: <http://trac.haskell.org/haddock/ticket/261>
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