Stop assuming that /usr/bin/python3 exists

  o Minor bugfixes (python):

    - Stop assuming that /usr/bin/python3 exists. For scripts that work with

      python2, use /usr/bin/python. Otherwise, use /usr/bin/env python3.

      Fixes bug 29913; bugfix on 0.2.5.3-alpha.

#!/usr/bin/python3

#!/usr/bin/python

# Copyright 2018 The Tor Project, Inc.  See LICENSE file for licensing info.

"""This script looks through all the directories for files matching *.c or

#!/usr/bin/python3

#!/usr/bin/python

"""

Best-practices tracker for Tor source code.

#!/usr/bin/python3

#!/usr/bin/python

import os

import os.path

#!/usr/bin/python3

#!/usr/bin/python

#   This software has been dedicated to the public domain under the CC0

#   public domain dedication.