message: Updated backend.py for the typo error
  Fixed one typo error in backend.py
diff: @@ -1590,7 +1590,7 @@ def min(x, axis=None, keepdims=False):
  the reduced dimension is retained with length 1.
  Returns:
  - A tensor with miminum values of `x`.
  + A tensor with minimum values of `x`.
  """
  return math_ops.reduce_min(x, axis, keepdims)
  