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[#22785] Fix printing of promoted MkSolo const

Andrei Borzenkov requested to merge sand-witch/ghc:Player205/#22785-Fix-MkSolo-printing into master

Problem: I found, that GHC prints type name of Solo type instead of its constructor, despite the fact that the real type was promoted data constructor. See #22785 (closed) for more details.

Solution:

  • Add new test case, that handle this behavior
  • Fix all places, where exists logic of tuple pretty printing

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