message: doc review: comment on number of CPU for python module
diff: @@ -44,7 +44,7 @@ cd build
  cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=$CONDA_PREFIX ..
  cd src/python
  # To build python module in parallel
  -python setup.py build_ext -j 16 --inplace
  +python setup.py build_ext -j 16 --inplace # 16 is the number of CPUthat are used to compile the python module. Can be any other value.
  # to clean the build
  # python setup.py clean --all
  ```
  @@ -88,6 +88,6 @@ cd build
  cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=$CONDA_PREFIX ..
  cd python
  # To build python module in parallel
  -python setup.py build_ext -j 16 --inplace
  +python setup.py build_ext -j 16 --inplace # 16 is the number of CPUthat are used to compile the python module. Can be any other value.
  firefox sphinx/index.html # [optional] To display the python documentation. Anything else than firefox can be used.
  ```
  \ No newline at end of file
  