docs: def yaml_str_join(l, n):
      '''
      YAML loader to join strings
  
      The keywords are as following:
  
      * `hostname`: Your hostname (from :func:`util.system.get_hostname`)
  
      * `timestamp`: Current timestamp (from :func:`util.system.get_timestamp`)
  
      :returns:
          A `non character` joined string |yaml_loader_returns|
  
      .. note::
          Be careful with timestamps when using a `config` in :ref:`settings`.
  
      .. seealso:: |yaml_loader_seealso|
      '''
  
      from photon.util.system import get_hostname, get_timestamp
  
      s = l.construct_sequence(n)
  
      for num, seq in enumerate(s):
          if seq == 'hostname':
              s[num] = '%s' % (get_hostname())
          elif seq == 'timestamp':
              s[num] = '%s' % (get_timestamp())
      return ''.join([str(i) for i in s])