code: def _format_command_usage(commands):
      
      if not commands:
          return ""
      command_usage = "\nCommands:\n"
      cmd_len = max([len(c) for c in commands] + [8])
      command_doc = OrderedDict(
          [(cmd_name, _get_first_line_of_docstring(cmd_doc))
           for cmd_name, cmd_doc in commands.items()])
      for cmd_name, cmd_doc in command_doc.items():
          command_usage += ("  {:%d}  {}\n" % cmd_len).format(cmd_name, cmd_doc)
      return command_usage
docs: Construct the Commands-part of the usage text.
  
      Parameters
      ----------
          commands : dict[str, func]
              dictionary of supported commands.
              Each entry should be a tuple of (name, function).
  
      Returns
      -------
          str
              Text formatted as a description of the commands.