Use Python3 executable, instead of Python
Use Python3 executable, instead of Python

macOS & Linux define the Python executable to be Python 2.x, and since
dox2html5 does not work with Python 2.x, explicitly use the Python 3.x
executable to ensure it's working.

mosra/m.css,mosra/m.css,mosra/m.css,mosra/m.css