old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  
  collect_ignore = ["setup.py", ".pythonrc.py", "build"]
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  # conftest.py
  
  
  collect_ignore = ["setup.py", "build", "dist"]
  
subject: Update ignore patterns