code: def merge_rest_docs(prnt_doc=None, child_doc=None):
      
      prnt_sections = parse_rest_doc(prnt_doc)
      child_sections = parse_rest_doc(child_doc)
  
      header = prnt_sections['']
      prnt_sections.update(child_sections)
      if not child_sections[''].body:
          prnt_sections[''] = header
          if not header.body:
              prnt_sections.popitem(last=False)
  
      return "\n\n".join(("\n".join((x.header, x.body)) for x in prnt_sections.values())).lstrip()
docs: See custom_inherit.style_store.reST for details.