message: [Documentation] Format code block.
diff: @@ -29,9 +29,11 @@ You can collect some of this information using our environment capture script:
  https://github.com/tensorflow/tensorflow/tree/master/tools/tf_env_collect.sh
  -You can obtain the TensorFlow version with
  +You can obtain the TensorFlow version with:
  +```bash
  python -c "import tensorflow as tf; print(tf.GIT_VERSION, tf.VERSION)"
  +```
  ### Describe the problem
  Describe the problem clearly here. Be sure to convey here why it's a bug in TensorFlow or a feature request.
  