class_docstr: A HelpFormatter with a couple of changes to meet our needs.
      
code: def add_usage(self, usage, actions, groups, prefix="::\n\n  %"):
      super(MagicHelpFormatter, self).add_usage(
          usage, actions, groups, prefix
      )
  
imports: import argparse
  import re
  from IPython.core.error import UsageError
  from IPython.utils.decorators import undoc
  from IPython.utils.process import arg_split
  from IPython.utils.text import dedent
label_desc: Use image node_id 3 for calling the MagicHelpFormatter obj's underlying member method code with example usage: obj.add_usage(usage, actions, groups, prefix) without return types