message: fixed some markup
diff: Follow these steps to get the preprocessor test working on Apollo 3:
  -1) Download the SDK to the be at the same level as tensorflow.git
  -2) Copy and prepare files by running tensorflow/lite/experimental/micro/tools/make/targets/apollo3evb/prep_apollo3_files.sh
  -3) Recompile libarm_cortexM4lf_math.a with the softfp option, and call it libarm_cartexM4lf_math_softfp.a. The original version was compiled with the hard option, and this caused conflicts with existing software. We might be able to fix this in the future
  -4) Install Segger JLink tools from https://www.segger.com/downloads/jlink/
  -5) Compile the preprocessor_test_bin project with the following command: make -f tensorflow/lite/experimental/micro/tools/make/Makefile TARGET=apollo3evb VENDORLIB=cmsis-dsp preprocessor_test_bin
  -6) Download to the target with JFlashLiteExe with the following settings:
  - a) Device = AMA3B1KK-KBR
  - b) Interface = SWD at 1000 kHz
  - c) Data file = tensorflow/lite/experimental/micro/tools/make/gen/apollo3evb_cortex-m4/bin/preprocessor_test.bin
  - d) Prog Addr = 0x0000C000
  -7) Connect to device via serial port (115200 baud) and press reset button. Should see all tests passed. Seeing a discrepance between Windows and Linux testing --> need to debug
  +1. Download the SDK to the be at the same level as tensorflow.git
  +2. Copy and prepare files by running tensorflow/lite/experimental/micro/tools/make/targets/apollo3evb/prep_apollo3_files.sh
  +3. Recompile libarm_cortexM4lf_math.a with the softfp option, and call it libarm_cartexM4lf_math_softfp.a. The original version was compiled with the hard option, and this caused conflicts with existing software. We might be able to fix this in the future
  +4. Install Segger JLink tools from https://www.segger.com/downloads/jlink/
  +5. Compile the preprocessor_test_bin project with the following command: make -f tensorflow/lite/experimental/micro/tools/make/Makefile TARGET=apollo3evb VENDORLIB=cmsis-dsp preprocessor_test_bin
  +6. Download to the target with JFlashLiteExe with the following settings:
  + 1. Device = AMA3B1KK-KBR
  + 2. Interface = SWD at 1000 kHz
  + 3. Data file = tensorflow/lite/experimental/micro/tools/make/gen/apollo3evb_cortex-m4/bin/preprocessor_test.bin
  + 4. Prog Addr = 0x0000C000
  +7. Connect to device via serial port (115200 baud) and press reset button. Should see all tests passed. Seeing a discrepance between Windows and Linux testing --> need to debug
  