message: readme format typo update
diff: @@ -294,11 +294,12 @@ Here we assume that you have basic knowledge on gathering dependency with
  `CMakeLists.txt` and the c++ file `main.cxx`
  2. Fill in the `main.cxx` with the code provided in
  [official c++ api basic](https://www.tensorflow.org/api_guides/cc/guide).
  -3. Fill in the `CMakeLists.txt` with following code: ``` cmake
  +3. Fill in the `CMakeLists.txt` with following code:
  +
  + ```cmake
  cmake_minimum_required (VERSION 2.6) project (tf_hello)
  # Tensorflow
  -
  find_package(Tensorflow REQUIRED)
  include_directories(${TENSORFLOW_INCLUDE_DIRS})
  @@ -314,7 +315,8 @@ Here we assume that you have basic knowledge on gathering dependency with
  this CMakeList.txt, under development") endif()
  add_executable(tf_hello main.cxx) target_link_libraries(tf_hello
  - ${TENSORFLOW_LIBRARIES}) ```
  + ${TENSORFLOW_LIBRARIES})
  + ```
  4. Configure the folder with cmake-gui, an error should be prompted out,
  requesting you to locate the folder containing `TensorflowConfig.cmake`.
  