[Bug-apl] Why not reset color for cout by default?

[Clouds Flowing]

Related thread: https://lists.gnu.org/archive/html/bug-apl/2013-10/msg00003.html

Now I see it is using `char Output::color_COUT[MAX_ESC_LEN] = CSI "0;30;49m";` in code, it is strange that reset background while set foreground to black.

I think it quite normal to use default (reset color) color for std::cout, i.e. use `CSI "0;39;49m"`.

I know it could be set in /etc/gnu-apl.d/preference, while we are talking about the default behavior.

Thanks,

Clouds