message: Update the math formula for LogLoss to match the parameters.
diff: @@ -503,7 +503,7 @@ class CategoricalHinge(Loss):
  class LogLoss(Loss):
  """Computes the log loss between `y_true` and `y_pred`.
  - logloss = -y log(p) - (1-y) log(1-p)
  + logloss = - y_true * log(y_pred) - (1 - y_true) * log(1 - y_pred)
  Usage:
  