message: Syntax highlighting for code regions by adding language
  Modified example image dtype conversion by using built in tf function
  for this operation
diff: @@ -26,12 +26,12 @@ At the moment TensorFlow I/O supports the following data sources:
  ### Python Package
  The `tensorflow-io` Python package could be installed with pip directly:
  -```
  +```sh
  $ pip install tensorflow-io
  ```
  People who are a little more adventurous can also try our nightly binaries:
  -```
  +```sh
  $ pip install tensorflow-io-nightly
  ```
  @@ -39,7 +39,7 @@ The use of tensorflow-io is straightforward with keras. Below is the example
  of [Get Started with TensorFlow](https://www.tensorflow.org/tutorials) with
  data processing replaced by tensorflow-io:
  -```
  +```python
  import tensorflow as tf
  import tensorflow_io.mnist as mnist_io
  @@ -50,7 +50,7 @@ d_train = mnist_io.MNISTDataset(
  compression_type="GZIP")
  # By default image data is uint8 so conver to float32.
  -d_train = d_train.map(lambda x, y: (tf.cast(x, tf.float32)/255.0, y)).batch(1)
  +d_train = d_train.map(lambda x, y: (tf.image.convert_image_dtype(x, tf.float32), y)).batch(1)
  model = tf.keras.models.Sequential([
  tf.keras.layers.Flatten(input_shape=(28, 28)),
  @@ -117,7 +117,7 @@ libraries built by Bazel to run `pytest` and build the `bdist_wheel`. Python
  Some tests require launching a test container before running. In order
  to run all tests, execute the following commands:
  -```
  +```sh
  $ bash -x -e tests/test_ignite/start_ignite.sh
  $ bash -x -e tests/test_kafka/kafka_test.sh start kafka
  $ bash -x -e tests/test_kinesis/kinesis_test.sh start kinesis
  