gh-112730: use keyword only argument for colorize

[methane]

• Issue: Use color to highlight error locations #112730

[methane]

sorry if there is a reason to use kwargs.

[methane]

Maybe, you don't want to expose this option as public API.

[maxeonyx]

@methane I think this was a good PR? Although changing away from **kwargs back to just a named arg means that this change would break anyone providing invalid args.

And yeah possibly they didn't want to expose it? But why not?