code: def get_key_section_header(self, key, spaces):
          
          header = super(NumpydocTools, self).get_key_section_header(key, spaces)
          header = spaces + header + '\n' + spaces + '-' * len(header) + '\n'
          return header
docs: Get the key of the header section
  
          :param key: the key name
          :param spaces: spaces to set at the beginning of the header