message: Markdown typo
  showed up in the docs
diff: @@ -370,7 +370,7 @@ class AdditiveAttention(BaseDenseAttention):
  3. Use scores to calculate a distribution with shape
  `[batch_size, Tq, Tv]`: `distribution = tf.nn.softmax(scores)`.
  4. Use `distribution` to create a linear combination of `value` with
  - shape `batch_size, Tq, dim]`:
  + shape `[batch_size, Tq, dim]`:
  `return tf.matmul(distribution, value)`.
  Args:
  