old_contents: # setup.py
  
  import io
  from setuptools import setup, find_packages
  
  setup(
      name='graphviz',
      version='0.13.3.dev0',
      author='Sebastian Bank',
      author_email='sebastian.bank@uni-leipzig.de',
      description='Simple Python interface for Graphviz',
      keywords='graph visualization dot render',
      license='MIT',
      url='https://github.com/xflr6/graphviz',
      packages=find_packages(),
      platforms='any',
      python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*',
      extras_require={
          'dev': ['tox>=3.0', 'flake8', 'pep8-naming', 'wheel', 'twine'],
          'test': ['mock>=2', 'pytest>=3.4,!=3.10.0', 'pytest-mock>=1.8', 'pytest-cov'],
          'docs': ['sphinx>=1.7', 'sphinx-rtd-theme'],
      },
      long_description=io.open('README.rst', encoding='utf-8').read(),
      classifiers=[
          'Development Status :: 4 - Beta',
          'Intended Audience :: Developers',
          'Intended Audience :: Science/Research',
          'License :: OSI Approved :: MIT License',
          'Operating System :: OS Independent',
          'Programming Language :: Python :: 2',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.5',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
          'Programming Language :: Python :: 3.8',
          'Topic :: Scientific/Engineering :: Visualization',
      ],
  )
  
new_contents: # setup.py
  
  import io
  from setuptools import setup, find_packages
  
  setup(
      name='graphviz',
      version='0.13.3.dev0',
      author='Sebastian Bank',
      author_email='sebastian.bank@uni-leipzig.de',
      description='Simple Python interface for Graphviz',
      keywords='graph visualization dot render',
      license='MIT',
      url='https://github.com/xflr6/graphviz',
      packages=find_packages(),
      platforms='any',
      python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*',
      extras_require={
          'dev': ['tox>=3', 'flake8', 'pep8-naming', 'wheel', 'twine'],
          'test': ['mock>=3', 'pytest>=3.4,!=3.10.0', 'pytest-mock>=1.8', 'pytest-cov'],
          'docs': ['sphinx>=1.7', 'sphinx-rtd-theme'],
      },
      long_description=io.open('README.rst', encoding='utf-8').read(),
      classifiers=[
          'Development Status :: 4 - Beta',
          'Intended Audience :: Developers',
          'Intended Audience :: Science/Research',
          'License :: OSI Approved :: MIT License',
          'Operating System :: OS Independent',
          'Programming Language :: Python :: 2',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.5',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
          'Programming Language :: Python :: 3.8',
          'Topic :: Scientific/Engineering :: Visualization',
      ],
  )
  
subject: fix failing ci requiring mock 3 features