content: -- precode
  data Config = Config 
    { servers :: [String]
    , timeouts :: [Int] 
    , flags :: [Bool]
    , metadata :: String
    } deriving (Show, Eq)
  
  
  instance Monoid Config where
    mempty = Config [] [] [] ""
    mappend c1 c2 = Config
      { servers  = servers c1 ++ servers c2
      , timeouts = timeouts c1 ++ timeouts c2
      , flags    = flags c1 ++ flags c2
      , metadata = metadata c1 ++ " " ++ metadata c2
      }
  
  mergeConfigs :: [Config] -> Config
  mergeConfigs = mconcat
  
  {-
  Ground Truth Metadata:
  Error Type: Fehlende Superclass-Instanz / Missing Superclass Instance
  Short Description: An instance for `Monoid Config` is defined without a corresponding `Semigroup Config` instance, which is a required superclass for `Monoid` in modern GHC versions.
  Intended Root Cause: Student is unaware of the superclass relationship `instance Semigroup a => Monoid a` and the constraint it imposes, possibly due to learning from outdated materials or misunderstanding typeclass dependencies.
  Affected Line(s): /
  -}
  -- RegEx-Cluster: Fehlende Superklassen-Instanz