cln: hlint: Fix newtype warning.

.hlint.yaml

@@ -64,7 +64,6 @@
 - ignore: {name: "Use replicate"}
 - ignore: {name: "Use void"}
 - ignore: {name: "Use bimap"}
-- ignore: {name: "Use newtype instead of data"}
 - ignore: {name: "Use elemIndex"}
 - ignore: {name: "Use =="}
 - ignore: {name: "Use lambda-case"}

hledger-lib/other/ledger-parse/Ledger/Parser/Text.hs

@@ -32,7 +32,7 @@ infixl 4 <$!>
 (<$!>) :: TokenParsing m => (a -> b) -> m a -> m b
 f <$!> ma = ($!) <$> pure f <*> ma
 
-data RawJournal = RawJournal [RawEntity]
+newtype RawJournal = RawJournal [RawEntity]
                 deriving (Show, Eq)
 
 data RawEntity = Whitespace String