old_contents: """Version string."""
  # main = X.Y.Z
  # sub = .devN for pre-alpha releases
  VERSION = '1.0.0'
  
new_contents: """Version string."""
  # main = X.Y.Z
  # sub = .devN for pre-alpha releases
  VERSION = '1.1.0'
  
subject: Bump version 1.1.0.