message: split long line
  split long line
diff: @@ -34,12 +34,14 @@ class Adam(optimizer_v2.OptimizerV2):
  Adam optimization is a stochastic gradient descent method that is based on
  adaptive estimation of first-order and second-order moments.
  According to the paper
  - [Adam: A Method for Stochastic Optimization. Kingma et al., 2014](http://arxiv.org/abs/1412.6980),
  + [Adam: A Method for Stochastic Optimization. Kingma et al.,
  + 2014](http://arxiv.org/abs/1412.6980),
  the method is "*computationally efficient, has little memory
  requirement, invariant to diagonal rescaling of gradients, and is well suited
  for problems that are large in terms of data/parameters*".
  - For AMSGrad see [On The Convergence Of Adam And Beyond. Reddi et al., 5-8](https://openreview.net/pdf?id=ryQu7f-RZ).
  + For AMSGrad see [On The Convergence Of Adam And Beyond.
  + Reddi et al., 5-8](https://openreview.net/pdf?id=ryQu7f-RZ).
  """
  def __init__(self,
  