code: def t_escaped_BACKSPACE_CHAR(self, t):
          r'\x62'  # 'b'
          t.lexer.pop_state()
          t.value = unichr(0x0008)
          return f t_escaped_BACKSPACE_CHAR(self, t):
          r'\x62'  # 'b'
          t.lexer.pop_state()
          t.value = unichr(0x0008)
          return t
docs: r'\x62