<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _composed_doc(fs):
 """ Generate a docstring for the composition of fs. """

    if not fs:
        # Argument name for the docstring.
        return 'n'

    return '{f}({g})'.format(f=fs[0].__name__, g=_composed_doc(fs[1:]))