[GHC] #8769: Minor refactoring of Maybe.lhs

[GHC]

#8769: Minor refactoring of Maybe.lhs
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       Reporter:  Iceland_jack       |             Owner:
           Type:  bug                |            Status:  new
       Priority:  lowest             |         Milestone:
      Component:  libraries (other)  |           Version:  7.7
       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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 Minor refactoring in Maybe.lhs.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8769>
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