Copyright (c) 2016 Code Combat
Copyright (c) 2009-2010 Scott Graham

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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Portions of the code were written with the benefit of viewing code that's in
the official "CPython" and "pypy" distribution and/or translated from code that's in the
official "CPython" and "pypy" distribution. As such, they are:

    Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006 Python Software
    Foundation; All Rights Reserved"

per:

    http://www.python.org/psf/license/
    http://www.python.org/download/releases/2.6.2/license/
    https://bitbucket.org/pypy/pypy/src/default/LICENSE