docs: def migrate(schema_file, config_file):
      '''Migrates a configuration file using a confirm schema.'''
  
      schema = load_schema_file(open(schema_file, 'r'))
      config = load_config_file(config_file, open(config_file, 'r').read())
  
      config = append_existing_values(schema, config)
  
      migrated_config = generate_config_parser(config)
      migrated_config.write(sys.stdout)