old_contents: MAJOR_VERSION = 2
  MINOR_VERSION = 4
  VERSION = "{MAJOR_VERSION}.{MINOR_VERSION}".format_map(locals())
  
new_contents: MAJOR_VERSION = 2
  MINOR_VERSION = 5
  VERSION = "{MAJOR_VERSION}.{MINOR_VERSION}".format_map(locals())
  
subject: Bump version 2.5