old_contents: """
  intervals
  ---------
  
  Python tools for handling intervals (ranges of comparable objects).
  """
  from setuptools import setup
  import os
  import re
  import sys
  
  HERE = os.path.dirname(os.path.abspath(__file__))
  PY3 = sys.version_info[0] == 3
  
  
  def get_version():
      filename = os.path.join(HERE, 'intervals', '__init__.py')
      with open(filename) as f:
          contents = f.read()
      pattern = r"^__version__ = '(.*?)'$"
      return re.search(pattern, contents, re.MULTILINE).group(1)
  
  
  extras_require = {
      'test': [
          'pytest==2.2.3',
          'Pygments>=1.2'
      ],
  }
  
  
  setup(
      name='intervals',
      version=get_version(),
      url='https://github.com/kvesteri/intervals',
      license='BSD',
      author='Konsta Vesterinen',
      author_email='konsta@fastmonkeys.com',
      description=(
          'Python tools for handling intervals (ranges of comparable objects).'
      ),
      long_description=__doc__,
      packages=['intervals'],
      zip_safe=False,
      include_package_data=True,
      platforms='any',
      dependency_links=[],
      install_requires=[
          'infinity>=0.1.3',
          'six>=1.4.1',
          'total_ordering>=0.1'
          if sys.version_info[0] == 2 and sys.version_info[1] < 7 else ''
      ],
      extras_require=extras_require,
      classifiers=[
          'Environment :: Web Environment',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: BSD License',
          'Operating System :: OS Independent',
          'Programming Language :: Python',
          'Programming Language :: Python :: 2',
          'Programming Language :: Python :: 2.6',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.3',
          'Programming Language :: Python :: 3.4',
          'Programming Language :: Python :: Implementation :: CPython',
          'Programming Language :: Python :: Implementation :: PyPy',
          'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
          'Topic :: Software Development :: Libraries :: Python Modules'
      ]
  )
  
new_contents: """
  intervals
  ---------
  
  Python tools for handling intervals (ranges of comparable objects).
  """
  from setuptools import setup
  import os
  import re
  import sys
  
  HERE = os.path.dirname(os.path.abspath(__file__))
  PY3 = sys.version_info[0] == 3
  
  
  def get_version():
      filename = os.path.join(HERE, 'intervals', '__init__.py')
      with open(filename) as f:
          contents = f.read()
      pattern = r"^__version__ = '(.*?)'$"
      return re.search(pattern, contents, re.MULTILINE).group(1)
  
  
  extras_require = {
      'test': [
          'pytest>=2.2.3',
          'Pygments>=1.2'
      ],
  }
  
  
  setup(
      name='intervals',
      version=get_version(),
      url='https://github.com/kvesteri/intervals',
      license='BSD',
      author='Konsta Vesterinen',
      author_email='konsta@fastmonkeys.com',
      description=(
          'Python tools for handling intervals (ranges of comparable objects).'
      ),
      long_description=__doc__,
      packages=['intervals'],
      zip_safe=False,
      include_package_data=True,
      platforms='any',
      dependency_links=[],
      install_requires=[
          'infinity>=0.1.3',
          'six>=1.4.1',
          'total_ordering>=0.1'
          if sys.version_info[0] == 2 and sys.version_info[1] < 7 else ''
      ],
      extras_require=extras_require,
      classifiers=[
          'Environment :: Web Environment',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: BSD License',
          'Operating System :: OS Independent',
          'Programming Language :: Python',
          'Programming Language :: Python :: 2',
          'Programming Language :: Python :: 2.6',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.3',
          'Programming Language :: Python :: 3.4',
          'Programming Language :: Python :: Implementation :: CPython',
          'Programming Language :: Python :: Implementation :: PyPy',
          'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
          'Topic :: Software Development :: Libraries :: Python Modules'
      ]
  )
  
subject: Make requirement more permissive