[GHC] #12821: Find the incredible vanishing [The improvement story]

[GHC]

#12821: Find the incredible vanishing [The improvement story]
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           Reporter:  bgamari        |             Owner:
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
  (Type checker)                     |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Somehow we lost Note [The improvement story] in `TcInteract`. There are
 references to it in `TcInteract` and `TcRnTypes` but the note itself is
 nowhere to be found. Someone must find it before it reaches the county
 border!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12821>
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