old_contents: class Settings(object):
      OPENSUBTITLES_SERVER = 'http://api.opensubtitles.org/xml-rpc'
      USER_AGENT = 'OS Test User Agent'
      LANGUAGE = 'en'
  
new_contents: class Settings(object):
      OPENSUBTITLES_SERVER = 'http://api.opensubtitles.org/xml-rpc'
      USER_AGENT = 'OSTestUserAgent'
      LANGUAGE = 'en'
  
subject: Update UserAgent