message: update as per review comment
diff: @@ -1479,7 +1479,7 @@ def random_uniform_variable(shape, low, high, dtype=None, name=None, seed=None):
  Example:
  - >>> kvar = tf.keras.backend.random_uniform_variable((2,3), 0, 1)
  + >>> kvar = tf.keras.backend.random_uniform_variable(shape=(2,3), low=0.0, high=1.0)
  >>> kvar
  <tf.Variable 'Variable:0' shape=(2, 3) dtype=float32, numpy=...,
  dtype=float32)>
  @@ -1513,7 +1513,7 @@ def random_normal_variable(shape, mean, scale, dtype=None, name=None,
  Example:
  - >>> kvar = tf.keras.backend.random_normal_variable((2,3), 0, 1)
  + >>> kvar = tf.keras.backend.random_normal_variable(shape=(2,3), mean=0.0, scale=1.0)
  >>> kvar
  <tf.Variable 'Variable:0' shape=(2, 3) dtype=float32, numpy=...,
  dtype=float32)>
  @@ -5656,8 +5656,8 @@ def random_normal(shape, mean=0.0, stddev=1.0, dtype=None, seed=None):
  Example:
  - >>> kvar = tf.keras.backend.random_normal((2,3), 0, 1)
  - >>> kvar
  + >>> random_normal_tensor = tf.keras.backend.random_normal(shape=(2,3), mean=0.0, stddev=1.0)
  + >>> random_normal_tensor
  <tf.Tensor: shape=(2, 3), dtype=float32, numpy=...,
  dtype=float32)>
  """
  @@ -5687,8 +5687,8 @@ def random_uniform(shape, minval=0.0, maxval=1.0, dtype=None, seed=None):
  Example:
  - >>> kvar = tf.keras.backend.random_uniform((2,3), 0, 1)
  - >>> kvar
  + >>> random_uniform_tensor = tf.keras.backend.random_uniform(shape=(2,3), minval=0.0, maxval=1.0)
  + >>> random_uniform_tensor
  <tf.Tensor: shape=(2, 3), dtype=float32, numpy=...,
  dtype=float32)>
  """
  @@ -5719,8 +5719,8 @@ def random_binomial(shape, p=0.0, dtype=None, seed=None):
  Example:
  - >>> kvar = tf.keras.backend.random_binomial((2,3), 0.5)
  - >>> kvar
  + >>> random_binomial_tensor = tf.keras.backend.random_binomial(shape=(2,3), p=0.5)
  + >>> random_binomial_tensor
  <tf.Tensor: shape=(2, 3), dtype=float32, numpy=...,
  dtype=float32)>
  """
  