message: add the missing closing parenthesis to code snippet
diff: @@ -404,8 +404,8 @@ y = tf.square(x)
  with tf.Session() as sess:
  # Feeding a value changes the result that is returned when you evaluate `y`.
  - print(sess.run(y, {x: [1.0, 2.0, 3.0]}) # => "[1.0, 4.0, 9.0]"
  - print(sess.run(y, {x: [0.0, 0.0, 5.0]}) # => "[0.0, 0.0, 25.0]"
  + print(sess.run(y, {x: [1.0, 2.0, 3.0]})) # => "[1.0, 4.0, 9.0]"
  + print(sess.run(y, {x: [0.0, 0.0, 5.0]})) # => "[0.0, 0.0, 25.0]"
  # Raises `tf.errors.InvalidArgumentError`, because you must feed a value for
  # a `tf.placeholder()` when evaluating a tensor that depends on it.
  