Enable colorful traceback conditionally
Enable colorful traceback conditionally

Provide colorful traceback if stderr is a valid TTY which mimicks the
'--color' behaviour on Unix. Thus, the output will not be mangled by
ANSI characters when used in a chain of tools.

windmill/windmill,windmill/windmill,windmill/windmill,windmill/windmill,windmill/windmill,windmill/windmill