docs: def fave_mentions(api, dry_run=None):
      '''
      Fave (aka like) recent mentions from user authenicated in 'api'.
      :api twitter_bot_utils.api.API
      :dry_run bool don't actually favorite, just report
      '''
      f = api.favorites(include_entities=False, count=150)
      favs = [m.id_str for m in f]
  
      try:
          mentions = api.mentions_timeline(trim_user=True, include_entities=False, count=75)
      except Exception as e:
          raise e
  
      for mention in mentions:
          # only try to fav if not in recent favs
          if mention.id_str not in favs:
              try:
                  api.logger.info('liking %s: %s', mention.id_str, mention.text)
  
                  if not dry_run:
                      api.create_favorite(mention.id_str, include_entities=False)
  
              except RateLimitError:
                  api.logger.warning("reached Twitter's rate limit, sleeping for %d minutes", RATE_LIMIT_RESET_MINUTES)
                  sleep(RATE_LIMIT_RESET_MINUTES * 60)
                  api.create_favorite(mention.id_str, include_entities=False)
  
              except TweepError as e:
                  api.logger.error('error liking %s', mention.id_str)
                  api.logger.error("code %s: %s", e.api_code, e)