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Alan Zimmerman authored
Summary: Pretty printing a splice with an HsAppType in the deriving clause, such as $([d| data Foo a = Foo a deriving (C a) |]) would omit the parens. Test Plan: ./validate Reviewers: RyanGlScott, austin, bgamari Subscribers: rwbarton, thomie GHC Trac Issues: #14289 Differential Revision: https://phabricator.haskell.org/D4056
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