old_contents: """Mailmerge build and install configuration."""
  import os
  import io
  import setuptools
  
  
  # Read the contents of README file
  PROJECT_DIR = os.path.abspath(os.path.dirname(__file__))
  with io.open(os.path.join(PROJECT_DIR, 'README.md'), encoding='utf-8') as f:
      LONG_DESCRIPTION = f.read()
  
  
  setuptools.setup(
      name="mailmerge",
      description="A simple, command line mail merge tool",
      long_description=LONG_DESCRIPTION,
      long_description_content_type="text/markdown",
      version="2.1.2",
      author="Andrew DeOrio",
      author_email="awdeorio@umich.edu",
      url="https://github.com/awdeorio/mailmerge/",
      license="MIT",
      packages=["mailmerge"],
      keywords=["mail merge", "mailmerge", "email"],
      install_requires=[
          "backports.csv;python_version<'3.0'",
          "click",
          "configparser;python_version<'3.6'",
  
          # The attachments feature relies on a bug fix in the future library
          # https://github.com/awdeorio/mailmerge/pull/56
          "future>0.18.0",
  
          "jinja2",
          "markdown",
          "mock;python_version<'3.0'",
          "pathlib2;python_version<'3.6'",
          "sh",
          "html5"
      ],
      extras_require={
          'dev': [
              'check-manifest',
              'codecov>=1.4.0',
  
              # Work around a dependency bug (I think) in pytest + python3.4
              "typing;python_version=='3.4'",
  
              'pdbpp',
              'pycodestyle',
              'pydocstyle',
              'pylint',
              'pytest',
              'pytest-cov',
              'tox',
              'twine',
          ]
      },
  
      # Python command line utilities will be installed in a PATH-accessible bin/
      entry_points={
          'console_scripts': [
              'mailmerge = mailmerge.__main__:main',
          ]
      },
  )
  
new_contents: """Mailmerge build and install configuration."""
  import os
  import io
  import setuptools
  
  
  # Read the contents of README file
  PROJECT_DIR = os.path.abspath(os.path.dirname(__file__))
  with io.open(os.path.join(PROJECT_DIR, 'README.md'), encoding='utf-8') as f:
      LONG_DESCRIPTION = f.read()
  
  
  setuptools.setup(
      name="mailmerge",
      description="A simple, command line mail merge tool",
      long_description=LONG_DESCRIPTION,
      long_description_content_type="text/markdown",
      version="2.1.2",
      author="Andrew DeOrio",
      author_email="awdeorio@umich.edu",
      url="https://github.com/awdeorio/mailmerge/",
      license="MIT",
      packages=["mailmerge"],
      keywords=["mail merge", "mailmerge", "email"],
      install_requires=[
          "backports.csv;python_version<'3.0'",
          "click",
          "configparser;python_version<'3.6'",
  
          # The attachments feature relies on a bug fix in the future library
          # https://github.com/awdeorio/mailmerge/pull/56
          "future>0.18.0",
  
          "jinja2",
          "markdown",
          "mock;python_version<'3.0'",
          "pathlib2;python_version<'3.6'",
          "sh",
  
          # Work around a dependency bug (I think) in pytest + python3.4
          "typing;python_version=='3.4'",
  
          "html5"
      ],
      extras_require={
          'dev': [
              'check-manifest',
              'codecov>=1.4.0',
              'pdbpp',
              'pycodestyle',
              'pydocstyle',
              'pylint',
              'pytest',
              'pytest-cov',
              'tox',
              'twine',
          ]
      },
  
      # Python command line utilities will be installed in a PATH-accessible bin/
      entry_points={
          'console_scripts': [
              'mailmerge = mailmerge.__main__:main',
          ]
      },
  )
  
subject: Move dep to install_requires