Octave doesn't show quotes when strings which are cell array values are displayed

[Sergei Steshenko]

Hello,

here is a screen session:

"
octave:27> CA{1}{1} = 2012
CA =
{
  [1,1] =
  {
    [1,1] =  2012
  }
}
octave:28> CA{1}{2} = "2012"
CA =
{
  [1,1] =
  {
    [1,1] =  2012
    [1,2] = 2012
  }
}
octave:29> whos("CA{1}{1}")
Variables in the current scope:

   Attr Name          Size                     Bytes  Class
   ==== ====          ====                     =====  =====
        CA{1}{1}      1x1                          8  double

Total is 1 element using 8 bytes

octave:30> whos("CA{1}{2}")
Variables in the current scope:

   Attr Name          Size                     Bytes  Class
   ==== ====          ====                     =====  =====
        CA{1}{2}      1x4                          4  char

Total is 4 elements using 4 bytes

octave:31>   
".

One can see that except for whitespaces both '2012' are displayed the same way, 
though Octave internally knows type - double vs char.

So, why some kind of quotes is not displayed to indicate string values ?

Thanks,
  Sergei.