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Template.hs:5:1: warning: [-Wsemigroup (in -Wcompat)]
Local definition of ‘<>’ clashes with a future Prelude name.
This will become an error in a future release.
Template.hs:11:3: warning: [-Wnoncanonical-monoid-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘(<>) = mappend’ definition detected
in the instance declaration for ‘Semigroup S’.
Move definition from ‘mappend’ to ‘(<>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/semigroup-monoid
Template.hs:14:3: warning: [-Wnoncanonical-monoid-instances (in -Wdefault, -Wcompat)]
Noncanonical ‘mappend’ definition detected
in the instance declaration for ‘Monoid S’.
‘mappend’ will eventually be removed in favour of ‘(<>)’
Either remove definition for ‘mappend’ (recommended) or define as ‘mappend = (<>)’
See also: https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/semigroup-monoid
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