code: def _format_action(self, action):
      # determine the required width and the entry label
      action_header = self._format_action_invocation(
          action, doubledash="-\\-"
      )
  
      if action.help:
          help_text = self._expand_help(action)
          help_lines = self._split_lines(help_text, 80)
          help = " ".join(help_lines)
      else:
          help = ""
  
      # return a single string
      return "{0}\n{1}\n{2}\n\n".format(
          action_header, "~" * len(action_header), help
      )
  
imports: import argparse
  import datetime
  import os
  import re
  import time
  from textwrap import wrap
label_desc: Use image node_id 11 for calling the RSTManPageFormatter obj's underlying member method code with example usage: obj._format_action(action) and returns: str