code: def find_whitespace_pattern(self):
          
          name_ws = []
          value_ws = []
          for entry in self._entries:
              name_ws.append(get_whitespace(entry.name))
              if entry.value != '':
                  value_ws.append(get_whitespace(entry._value))  # _value is unstripped
          if len(value_ws) >= 1:
              value_ws = most_common(value_ws)
          else:
              value_ws = ('', ' ')
          if len(name_ws) >= 1:
              name_ws = most_common(name_ws)
          else:
              name_ws = (' ', '')
          return name_ws, value_ws
docs: Try to find a whitespace pattern in the existing parameters
          to be applied to a newly added parameter