[GHC] #13013: Add readMaybe to Prelude (possibly readEither too), make Haddocks for read more cautionary

[GHC]

#13013: Add readMaybe to Prelude (possibly readEither too), make Haddocks for read
more cautionary
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        Reporter:  sjakobi           |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Core Libraries    |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by sjakobi):

 For context, the idea for this proposal came up in
 [https://www.reddit.com/r/haskell/comments/5j8mpx/haskell_pitfalls/dben8h2/
 this discussion on r/haskell].

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13013#comment:1>
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