old_contents: import io
  from setuptools import setup, find_packages
  
  long_description = "\n".join(
      (
          io.open("README.rst", encoding="utf-8").read(),
          io.open("CHANGES.txt", encoding="utf-8").read(),
      )
  )
  
  setup(
      name="reg",
      version="0.13.dev0",
      description="Clever dispatch",
      long_description=long_description,
      author="Martijn Faassen",
      author_email="faassen@startifact.com",
      license="BSD",
      url="http://reg.readthedocs.io",
      packages=find_packages(),
      include_package_data=True,
      zip_safe=False,
      classifiers=[
          "Intended Audience :: Developers",
          "License :: OSI Approved :: BSD License",
          "Topic :: Software Development :: Libraries :: Python Modules",
          "Programming Language :: Python :: 3.4",
          "Programming Language :: Python :: 3.5",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3.8",
          "Programming Language :: Python :: Implementation :: PyPy",
          "Development Status :: 5 - Production/Stable",
      ],
      install_requires=["setuptools", "repoze.lru"],
      extras_require=dict(
          test=["pytest >= 2.9.0", "sphinx", "pytest-remove-stale-bytecode"],
          pep8=["flake8", "black"],
          coverage=["pytest-cov"],
          docs=["sphinx"],
      ),
  )
  
new_contents: import io
  from setuptools import setup, find_packages
  
  long_description = "\n".join(
      (
          io.open("README.rst", encoding="utf-8").read(),
          io.open("CHANGES.txt", encoding="utf-8").read(),
      )
  )
  
  setup(
      name="reg",
      version="0.13.dev0",
      description="Clever dispatch",
      long_description=long_description,
      author="Martijn Faassen",
      author_email="faassen@startifact.com",
      license="BSD",
      url="http://reg.readthedocs.io",
      packages=find_packages(),
      include_package_data=True,
      zip_safe=False,
      classifiers=[
          "Intended Audience :: Developers",
          "License :: OSI Approved :: BSD License",
          "Topic :: Software Development :: Libraries :: Python Modules",
          "Programming Language :: Python :: 3.6",
          "Programming Language :: Python :: 3.7",
          "Programming Language :: Python :: 3.8",
          "Programming Language :: Python :: Implementation :: PyPy",
          "Development Status :: 5 - Production/Stable",
      ],
      install_requires=["setuptools", "repoze.lru"],
      extras_require=dict(
          test=["pytest >= 2.9.0", "sphinx", "pytest-remove-stale-bytecode"],
          pep8=["flake8", "black"],
          coverage=["pytest-cov"],
          docs=["sphinx"],
      ),
  )
  
subject: Update list of supported Python versions