pep8 to pull_up_method.py
pep8 to extract_method.py
pep8 to shingles_test.py
pep8 to shingles.py
pep8 to refactoring_detection.py but still have problems
pep8 to parser.py
pep8 to pull_up_method.py
pep8 to exc.py
followed PEP8