old_contents: #!/usr/bin/env python
  import caveats
  
  blocks = caveats.parse("CAVEATS.md")
  tests = caveats.format_(blocks)
  
  # Write formatted tests
  with open("test_caveats.py", "w") as f:
      f.write("".join(tests))
new_contents: #!/usr/bin/env python
  import caveats
  
  blocks = caveats.parse("CAVEATS.md")
  tests = caveats.format_(blocks)
  
  # Write formatted tests
  with open("test_caveats.py", "w") as f:
      f.write("".join(tests))
  
subject: Revert change