code: def module_description(module__name__, module__doc__, module__file__):
      
      mod_name = os.path.splitext(os.path.basename(module__file__))[0]
  
      mod_desc = (lambda x: x + '\n' + '='*len(x) + '\n')('Module '+mod_name) if mod_name else ''
      for name, obj in inspect.getmembers(sys.modules[module__name__]):
          if inspect.isclass(obj) and '__doc__' in dir(obj) and obj.__doc__:
              mod_desc += '\n' + (lambda x: x + '\n' + '-'*len(x) + '\n')('Class '+name)
              mod_desc += obj.__doc__.lstrip()
      return mod_desc
docs: Return formatted text that lists the module-level and class-level
      embedded documentation.  The function should be called exactly
      as:
  
          taskforce.utils.module_description(__name__, __doc__, __file__)
  
      The most common use for this function is to produce the help
      message for test code in a library module, which might look
      something like:
  
      if __name__ == "__main__":
          import ns_utils, argparse
  
          p = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter,
                  description=taskforce.utils.module_description(__name__, __doc__, __file__))