[Bug-apl] Not a syntax error

[Blake McBride]

      ∇gg
[1] 4
[2] ∇
      gg
4
      x←gg
4
SYNTAX ERROR
      x←gg
      ^ ^

I understand what is wrong with gg.  The problem is the error message.  I
think it is wrong.  Shouldn't it be VALUE ERROR  ?

Thanks.

Blake