patch applied (ghc): Teach :history to show the name of the enclosing declaration

[Pepe Iborra]

Wed Aug 15 09:11:30 PDT 2007  Pepe Iborra <mnislaih at gmail.com>
  * Teach :history to show the name of the enclosing declaration 
   together with src locs
  
  Purely for convenience and user friendliness

    M ./compiler/ghci/InteractiveUI.hs -3 +8
    M ./compiler/main/GHC.hs -1 +7
    M ./compiler/main/InteractiveEval.hs -13 +42