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.

diff --git a/doxygen/dox2html5.py b/doxygen/dox2html5.py
index 51559ea8f4abc9f61970d205f640b2ab1da8c90c..13f788ffa54579538bc5fc7cf873dea0dceb3355 100755 (executable)
--- a/doxygen/dox2html5.py
+++ b/doxygen/dox2html5.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 #
 #   This file is part of m.css.