complex conjugate roots produced by 'roots'

[Sergei Steshenko]

Hello,

I am playing with 'roots' function in octave-3.6.4 and I see it outputs complex 
conjugate roots in pairs, e.g.:

ans =

   0.71911 + 0.71727i
   0.71911 - 0.71727i
   0.80973 + 0.59963i
   0.80973 - 0.59963i
   0.83780 + 0.55828i
   0.83780 - 0.55828i
   0.83802 + 0.54890i
   0.83802 - 0.54890i
   0.83116 + 0.55464i
   0.83116 - 0.55464i
...
.

This is quite OK with me and is desired by me behavior.

Is this by design and intended, or it can change at any moment ?

Thanks,
  Sergei.