'Edge at index is same as edge to right.  Merge directly with \'\''

def _merge_right_line(self, index):

    self._indent()
    for c in range(index):
        self._write_edge('|    ', c)
    self._write_edge('|', index)
    self._write_edge('\\', (index + 1))
    for c in range((index + 1), len(self._frontier)):
        self._write_edge('|    ', c)
    self._set_state(MERGE_RIGHT, index)
    self._out.write('\n')
