followed PEP8: pull_up_method.py
followed PEP8: shingles.py
followed PEP8: shingles_test.py
followed PEP8: submodule.py
followed PEP8: exc.py
followed PEP8: util.py
followed PEP8: parser.py
followed PEP8: diff.py
followed PEP8: distiller.py
followed PEP8: pull_up_method
followed PEP8: tree_contents.py