Another extension that Brittany cannot parse (#1369)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: pepeiborra

plugins/default/src/Ide/Plugin/Brittany.hs

@@ -111,6 +111,7 @@ showExtension :: Extension -> Maybe String
 showExtension Cpp = Just "-XCPP"
 -- Brittany chokes on parsing extensions that produce warnings
 showExtension DatatypeContexts = Nothing
+showExtension RecordPuns = Just "-XNamedFieldPuns"
 showExtension other = Just $ "-X" ++ show other
 
 getExtensions :: D.DynFlags -> [String]