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Herbert Valerio Riedel authored
In `base`, the instances instance Show () instance Show Bool instance Show Ordering instance Show a => Show (Maybe a) where defined manually, even though we can leverage GHC's auto-deriver which is perfectly capable by standalone derivation to avoid boiler-plate code such as this. Reviewed By: austin Differential Revision: https://phabricator.haskell.org/D219
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