Feature or enhancement

In Python 3.13, we added colour output to the new REPL, tracebacks and doctest, that can also be controlled with the PYTHON_COLORS, NO_COLOR and FORCE_COLOR environment variables:

• https://docs.python.org/3/whatsnew/3.13.html#summary-release-highlights
• https://docs.python.org/3.13/using/cmdline.html#using-on-controlling-color

Let's add colour to unittest output.

Linked PRs

• gh-127221: Add colour to unittest output #127223