open +>>

[Silvio Luis Leite Santana]

Hi all
The camel-book and perldoc-page says about "open":

  You may also place a + in front of any of these three
  modes to request simultaneous read and write.
  +<  is for read/write updates
  +>  clobber the file, reread only what you wrote

What would +>> do? the same as +< ? the camel-book
says nothing, as far I've read.

Thanks in adv
Silvio