old_contents: #!/usr/bin/env python
  from setuptools import setup
  
  
  setup(
      setup_requires=['pbr==1.0.1'],
      pbr=True,
      tests_require=['mock', 'nose', ],
      test_suite='nose.collector',
      platforms=['any'],
      zip_safe=False,
  )
  
new_contents: #!/usr/bin/env python
  from setuptools import setup
  
  
  setup(
      setup_requires=['pbr==1.8.1'],
      pbr=True,
      tests_require=['mock', 'nose', ],
      test_suite='nose.collector',
      platforms=['any'],
      zip_safe=False,
  )
  
subject: Update pbr from version 1.0.1 to 1.8.1.