Update Python hashbang to respect environment

The /usr/bin/python hashbang causes doc builds to fail when Python3 is
the default Python and Python2 is being used from within a virtualenv or
Pythonbrew environment.

Signed-off-by: Sharif Olorin <sio@tesser.org>

diff --git a/doc/scripts/gen_state_diagram.py b/doc/scripts/gen_state_diagram.py
index 603cb9c821e1c62a73fd79d56f89cf9286565404..a1830826500f68cae1d7e0319f88c3ab09018c58 100755 (executable)
--- a/doc/scripts/gen_state_diagram.py
+++ b/doc/scripts/gen_state_diagram.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 import re
 import sys