old_contents: 
  """
  Install file for SciTokens project.
  """
  
  import os.path
  import re
  
  import setuptools
  
  
  def find_version(path, varname="__version__"):
      """Parse the version metadata variable in the given file.
      """
      with open(path, 'r') as fobj:
          version_file = fobj.read()
      version_match = re.search(
          r"^{0} = ['\"]([^'\"]*)['\"]".format(varname),
          version_file,
          re.M,
      )
      if version_match:
          return version_match.group(1)
      raise RuntimeError("Unable to find version string.")
  
  
  setuptools.setup(
      # metadata
      name="scitokens",
      version=find_version(os.path.join("src", "scitokens", "__init__.py")),
      description="SciToken reference implementation library",
      author_email="team@scitokens.org",
      author="Brian Bockelman",
      license="Apache-2.0",
      url="https://scitokens.org",
      # contents
      package_dir={
          "": "src",
      },
      packages=[
          "scitokens",
          "scitokens.tools",
          "scitokens.utils",
      ],
      entry_points={
          "console_scripts": [
              "scitokens-admin-create-key=scitokens.tools.admin_create_key:main",
              "scitokens-admin-create-token=scitokens.tools.admin_create_token:main",
          ],
      },
      # requirements
      install_requires=[
          'cryptography',
          'PyJWT>=1.6.1',
          'six',
      ],
  )
  
new_contents: 
  """
  Install file for SciTokens project.
  """
  
  import os.path
  import re
  
  import setuptools
  
  
  def find_version(path, varname="__version__"):
      """Parse the version metadata variable in the given file.
      """
      with open(path, 'r') as fobj:
          version_file = fobj.read()
      version_match = re.search(
          r"^{0} = ['\"]([^'\"]*)['\"]".format(varname),
          version_file,
          re.M,
      )
      if version_match:
          return version_match.group(1)
      raise RuntimeError("Unable to find version string.")
  
  
  setuptools.setup(
      # metadata
      name="scitokens",
      version=find_version(os.path.join("src", "scitokens", "__init__.py")),
      description="SciToken reference implementation library",
      author_email="team@scitokens.org",
      author="Brian Bockelman",
      license="Apache-2.0",
      url="https://scitokens.org",
      project_urls={
          "Issue Tracker": "https://github.com/scitokens/scitokens/issues",
          "Source Code": "https://github.com/scitokens/scitokens",
      },
      # contents
      package_dir={
          "": "src",
      },
      packages=[
          "scitokens",
          "scitokens.tools",
          "scitokens.utils",
      ],
      entry_points={
          "console_scripts": [
              "scitokens-admin-create-key=scitokens.tools.admin_create_key:main",
              "scitokens-admin-create-token=scitokens.tools.admin_create_token:main",
          ],
      },
      # requirements
      install_requires=[
          'cryptography',
          'PyJWT>=1.6.1',
          'six',
      ],
  )
  
subject: add project_urls