parameters: (args, output_file)
return_statement: return args + ['-o', output_file]
docstring: Append an output file to args, presuming not already specified.
docstring_summary: Append an output file to args, presuming not already specified.
docstring_tokens: Append an output file to args presuming not already specified .
function: def add_output_file(args, output_file):
      """Append an output file to args, presuming not already specified."""
      return args + ['-o', output_file]
function_tokens: def add_output_file ( args , output_file ) : return args + [ '-o' , output_file ]