old_contents: #!/usr/bin/env python
  
  from setuptools import setup, find_packages
  import subprocess
  
  setup(name="singer-python",
        version='5.0.7',
        description="Singer.io utility library",
        author="Stitch",
        classifiers=['Programming Language :: Python :: 3 :: Only'],
        url="http://singer.io",
        install_requires=[
            'jsonschema==2.6.0',
            'pendulum==1.2.0',
            'simplejson==3.11.1',
            'python-dateutil>=2.6.0',
            'backoff==1.3.2',
        ],
        extras_require={
            'dev': [
                'pylint',
                'nose'
            ]
        },
        packages=find_packages(),
        package_data = {
            'singer': [
                'logging.conf'
                ]
            },
  )
  
new_contents: #!/usr/bin/env python
  
  from setuptools import setup, find_packages
  import subprocess
  
  setup(name="singer-python",
        version='5.0.7',
        description="Singer.io utility library",
        author="Stitch",
        classifiers=['Programming Language :: Python :: 3 :: Only'],
        url="http://singer.io",
        install_requires=[
            'jsonschema==2.6.0',
            'pendulum==1.2.0',
            'simplejson==3.11.1',
            'python-dateutil>=2.6.0',
            'backoff==1.3.2',
        ],
        extras_require={
            'dev': [
                'pylint',
                'nose',
                'singer-tools'
            ]
        },
        packages=find_packages(),
        package_data = {
            'singer': [
                'logging.conf'
                ]
            },
  )
  
subject: Add singer-tools as a dev dependency