[GHC] #11359: Consider removing RelaxedLayout and friends

[GHC]

#11359: Consider removing RelaxedLayout and friends
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.3
  (Parser)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by thomie):

 More information about `AlternativeLayoutRule` and
 `AlternativeLayoutRuleTraditional`:
 https://prime.haskell.org/wiki/AlternativeLayoutRule.

 It is used for multiline mode in GHCi (`+m`, #4316).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11359#comment:1>
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