code: def do_help(self, line):
          
          # We provide a help function so that we can trim the leading spaces
          # from the docstrings. The builtin help function doesn't do that.
          if not line:
              cmd.Cmd.do_help(self, line)
              self.print(EXIT_STR)
              return
          parser = self.create_argparser(line)
          if parser:
              parser.print_help()
              return
          try:
              doc = getattr(self, 'do_' + line).__doc__
              if doc:
                  self.print("%s" % trim(doc))
                  return
          except AttributeError:
              pass
          self.print(str(self.nohelp % (line,)))
docs: help [COMMAND]
  
             List available commands with no arguments, or detailed help when
             a command is provided.