[GHC] #9154: Links to Cabal documentation from the user guide are broken

[GHC]

#9154: Links to Cabal documentation from the user guide are broken
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        Reporter:  etrepum           |            Owner:
            Type:  bug               |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  Documentation     |          Version:  7.8.2
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by etrepum):

 0001-Use-absolute-links-to-Cabal-docs-from-the-GHC-users-.patch only
 updates the GHC users guide, does not fix the issue with haddock's
 documentation.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9154#comment:1>
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