Unexpected side affect of Ansi.isSupported checking terminal.

The method Ansi.isSupported checks if a ansi escape sequences are supported on the current terminal.

To make this more reliable it now checks if a terminal is attached by calling stdout.isTerminal.

This has worked well.

However there was an unexpected side effect.

If you run'

final list = start('some command', progress: Progress.capture()).toList();
print(list);

The previously the printed list included any ansi coloring.
With the new Ansi.isSupported check the output of any colour escape codes is suppressed because there is no terminal attached (we are capturing the output to a list).
This is not what I would normally want.
I'm think that we change the colour methods so the still output ansi escape sequences even if a terminal isn't attached.
This has the down side that we get colours logged to log files.
We do have the Ansi.strip() method that strips out colour which can be used as a filter when logging.

Discussion welcomed.

Start with Ansi.isSupported and its stdout.isTerminal check, then inspect the colour methods and the example using start with Progress.capture().toList(). Compare captured output with and without a terminal, and use Ansi.strip() as the reference for the expected logging workaround; the desired behavior still needs confirmation because the issue invites discussion.