parameters: (arg)
docstring: Always return a list of strings, given a string or list of strings
      as input.
  
      Examples
      --------
      ::
  
          In [7]: list_strings('A single string')
          Out[7]: ['A single string']
  
          In [8]: list_strings(['A single string in a list'])
          Out[8]: ['A single string in a list']
  
          In [9]: list_strings(['A','list','of','strings'])
          Out[9]: ['A', 'list', 'of', 'strings']
docstring_summary: Always return a list of strings, given a string or list of strings
      as input.
docstring_tokens: Always return a list of strings given a string or list of strings as input .
function: def list_strings(arg):
      """Always return a list of strings, given a string or list of strings
      as input.
  
      Examples
      --------
      ::
  
          In [7]: list_strings('A single string')
          Out[7]: ['A single string']
  
          In [8]: list_strings(['A single string in a list'])
          Out[8]: ['A single string in a list']
  
          In [9]: list_strings(['A','list','of','strings'])
          Out[9]: ['A', 'list', 'of', 'strings']
      """
  
      if isinstance(arg, str):
          return [arg]
      else:
          return arg
function_tokens: def list_strings ( arg ) : if isinstance ( arg , str ) : return [ arg ] else : return arg