remove vestigial python2 references
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@@ -165,7 +165,7 @@ to stick to PEP8_ when writing new code. If you're refactoring old code, it
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would be great if you were to fix it to make it PEP8 compliant as well.
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To check whether the code is PEP8 compliant, you can use pycodestyle_. You can
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easily install it with pip by using ``pip2 install pycodestyle``.
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easily install it with pip by using ``pip3 install pycodestyle``.
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.. _PEP8: https://www.python.org/dev/peps/pep-0008/
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.. _pycodestyle: https://pypi.python.org/pypi/pycodestyle
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